Inclusion Criteria:

          1. ≥ 18 years of age.

          2. Signed written informed consent.

          3. Histologically confirmed cutaneous melanoma that is either Stage IIIc (unresectable)
             or Stage IV (metastatic), and determined to be BRAF V600E/K mutation-positive by the
             central laboratory. Subjects with ocular or mucosal melanoma are not eligible.

          4. Assessable lesion for biopsy at week 2 not inferring with RECIST measurements
             (Biopsies for genetic/biomarker analyses must be taken from lesions not required for
             disease assessment)

          5. Measurable disease, i.e., present with at least one measurable lesion per RECIST,
             version 1.1 for the definition of a measureable lesion.

          6. For Cohort A: Must NOT have received prior treatment with BRAF or MEK inhibitor.

             If a prior systemic therapy (such as but not limited to chemotherapy, immunotherapy,
             biologic, vaccine and/or investigational treatment) in metastatic disease has been
             administered, four weeks or more since last systemic treatment must have passed. Must
             have recovered from any acute toxicity associated with prior therapy.

          7. For Cohort B: Must have shown PR/CR during treatment with selective BRAF/MEK
             combination treatment that was discontinued due to tumor progression and received
             subsequent alternative treatment (such as but not limited to surgery, chemotherapy,
             immunotherapy, biologic, vaccine and/or investigational treatment), with a period of
             at least 3 months since last intake of BRAF/MEK inhibitor

          8. All prior treatment-related toxicities (except alopecia) must be ≤ Grade 1 according
             to the Common Terminology Criteria of Adverse Events (CTCAE, Version 9. Able to
             swallow and retain oral medication and must not have any clinically significant
             gastrointestinal abnormalities that may alter absorption such as malabsorption
             syndrome or major resection of the stomach or bowels.

        10. Women of childbearing potential must have a negative urin pregnancy test within 7 days
        prior to registration and agree to use effective contraception, as defined in Section 9.8
        throughout the treatment period, and for 4 months after the last dose of study treatment.

        Men with a female partner of childbearing potential must have either had a prior vasectomy
        or agree to use effective contraception as described in Section 9.8 throughout the
        treatment period, and for 4 months after the last dose of study treatment. 11. An Eastern
        Cooperative Oncology Group (ECOG) performance status of 0 or 1 12. Adequate baseline organ
        function defined as Absolute Neutrophil Count ≥1.2 × 109/L Hemoglobin ≥ 9 g/dL Platelet
        count ≥ 100 x 109/L Prothrombinzeit (PT/INR) and Partial thromboplastin time ≤ 1.3 x upper
        laboratory norm (ULN) Albumin ≥ 2.5 g/dL Total bilirubin ≤ 1.5 x ULN Aspartate
        aminotransferase and Alanine Aminotransferase ≤ 2.5 x ULN Serum creatinine ≤ 1.5 mg/dL 13.
        A left ventricular ejection fraction (LVEF) ≥ the institutional lower limit of normal as
        measured by ECHO

        Exclusion Criteria:

          1. Any major surgery, extensive radiotherapy, chemotherapy with delayed toxicity,
             biologic therapy, or immunotherapy within 21 days prior to registration and/or daily
             or weekly chemotherapy without the potential for delayed toxicity within 14 days prior
             to registration.

          2. Taken an investigational drug within 28 days or 5 half-lives (minimum 14 days),
             whichever is shorter, prior to registration.

          3. Current use of a prohibited medication

          4. History of another malignancy. Exception: Subjects who have been disease-free for 3
             years, subjects with a history of completely resected non-melanoma skin cancer, and/or
             subjects with successfully treated in situ carcinoma are eligible. Subjects with
             second malignancies that are indolent or definitively treated may be enrolled.

          5. Any serious or unstable pre-existing medical conditions (aside from malignancy
             exceptions specified above), psychiatric disorders, or other conditions that could
             interfere with the subject's safety, obtaining informed consent, or compliance with
             study procedures.

          6. Known Human Immunodeficiency Virus (HIV), active Hepatitis B Virus (HBV), or active
             Hepatitis C Virus (HCV). Subjects with chronic or cleared HBV and/or HCV are eligible.

          7. A history of glucose-6-phosphate dehydrogenase (G6PD) deficiency.

          8. Subjects with brain metastases are excluded, unless:

               -  All known lesions must be previously treated with surgery or stereotactic
                  radiosurgery, and

               -  Brain lesion(s), if present, must be confirmed stable (ie, no increase in lesion
                  size) for 90 days prior to first dose of study drug(s). This must be documented
                  with two consecutive MRI or CT scans using contrast, and

               -  Asymptomatic with no corticosteroids requirement for 30 days prior to first dose
                  of study drug(s), and

               -  No enzyme-inducing anticonvulsants for 30 days prior to first dose of study
                  drug(s).

             In addition, even in cases of no evidence of disease (NED), confirmation on two
             consecutive MRI or CT scans using contrast will be required. Enrollment of a subject
             with brain metastases who meet the above criteria requires approval of the sponsor

          9. A history or evidence of cardiovascular risk including any of the following:

               1. A QT interval corrected for heart rate using the Bazett's formula (QTcB; ³ 480
                  msec;

               2. A history or evidence of current clinically significant uncontrolled arrhythmias;
                  Exception: Subjects with controlled atrial fibrillation for > 30 days prior to
                  registration are eligible.

               3. A history of acute coronary syndromes (including myocardial infarction or
                  unstable angina), coronary angioplasty, or stenting within 6 months prior to
                  registration; or

               4. A history or evidence of current ≥ Class II congestive heart failure as defined
                  by the New York Heart Association (NYHA) guidelines.

         10. A history or current evidence/risk of retinal vein occlusion (RVO) or central serous
             retinopathy (CSR) including:

             Presence of predisposing factors to RVO or CSR (e.g., uncontrolled glaucoma or ocular
             hypertension, uncontrolled hypertension, uncontrolled diabetes mellitus, or a history
             of hyperviscosity or hypercoagulability syndromes); or

             Visible retinal pathology as assessed by ophthalmic examination that is considered a
             risk factor for RVO or CSR such as:

             i. Evidence of new optic disc cupping; ii. Evidence of new visual field defects on
             automated perimetry; iii. Intraocular pressure > 21 mmHg as measured by tonography.

         11. Known immediate or delayed hypersensitivity reaction or idiosyncrasy to drugs
             chemically related to the study treatments, their excipients, and/or dimethyl
             sulfoxide (DMSO).

         12. Interstitial lung disease or pneumonitis

         13. Pregnant or breast-feeding females.