Download VIA Software (1.3.1):
Megalodon Macro Pad with 2 Outemu Big Switches (KB-05): /kb-05_via.json.zip
Megalodon Macro Pad with a Knob/Megalodon Knob Pad (KB-04): /kb-04_via.json.zip
Megalodon Triple Knob Macro Pad (KB-16):/kb16via.json.zip
Megalodon 38% Keyboard with 3 Knobs (KB-38):/kb38.json.zip
Unzip the file after you download it, and get the .json file.
After choosing Import Keycap, select the .json file.
You cannot adjust the RGB of the keyboard directly in the VIA Software. Use the QMKLighting section in VIA, assign lighting command values to your keyboard (For example BL+, BL-, Hue+, Hue-, Sat+, Sat-), and adjust the lighting on the keyboard.
You do not need to use one of your macros to do a simple key combination like GUI + N or CTRL + N. Instead, inside via go to Special and then click Any:
Once you click the Any button a dialog will pop up. You can insert any singular keycode you like, this includes those codes that have modifiers. In our example we used GUI (Mac OS Command) and N:
Once you hit confirm, you'll see your new key looks like this:
Go to the key tester and you can confirm this is now working! You can find a list of modifier keys that are usable here.