When one opens the GUI, one can see two fields, two buttons and a top bar with a few more buttons. More pictures coming later.
The list on the left. Lists the modpacks curretly installed in the modpacks folder.
The text field on the right. If a mod is clicked from the mod list, the contents of the mod can be seen in the mod content text field.
Save writes the text from the mod content view into the mod file in the modpacks folder.
Asks for a name and saves the mod content text into the corresponding pack. If pack doesn't exist, it is created.
Open the mods/modpacks/cache folders in windows explorer or equivalent. Useful for manual mod insertion for example.
Re-loads modpack files from the modpacks folder.
Behavior is identical to the "Add a pack" button below mod list
Decompress a pack compressed with "get as string". Useful for sharing packs.
Behavior is identical to the "Install" button below mod list.
Forms a hash of currently selected pack and changes the text in mod content box to show the user this hash.