Here's an explanation of each of Apt's menu options, one by one.
Apt Menu
Settings
Go to the settings form.
Enable
Enable Apt.
Disable
Disable Apt, it will now have no effect on your device.
Toggle Font
Swap between standard and small font, shows 14 lines on trigger screens when using small
fonts on a square screen.
Remove
Remove Apt from your device. If your device doesn't reset by itself, you will need to do it manually.
Profile Menu
Reset
Resets prefs for this target.
Delete
Deletes prefs for this target and returns to *Default*.
Delete All
Deletes prefs for all targets except *Default*.
Toggle VFS
Toggle showing of apps on external memory cards in the target selector See the settings form for the current setting. Apt will restart after this item is selected.
Toggle Hidden
Toggle showing of hidden apps in the target selector See the settings form for the current setting. Apt will restart after this item is selected.
Edit Menu
Copy
Copies the current target prefs to the clipboard.
Paste
Pastes the clipboard to the current target prefs.
PasteID
Pastes the last ID selected via the actions Apt:ListMenu, Apt:ListFld, Apt:ListCtrl, Apt::ListFrom.
PastePoint
Pastes the last screen coordinate obtained via the Apt:GetPoint action.