Completely re-structured the backup process:
This gives the user 100% flexibility on what they want to back up.
The user can decide on a name and path like so:
Modify the path.txt file in ur0:/data/VitaBackup/path.txt and add entries in the following format:
[name]~[path]
Example:
Trophies~ux0:/user/00/trophy
Licenses~ux0:/license
Do not put a forward slash at the end if it's a folder.
Prevent home button and auto-suspend during backup/restore process.
Only display scroll bar if we have more than 5 files.
Use the proper enter/cancel buttons depending on your device's region. (JP uses the "Cross" button to cancel items)
Backup archives have their timestamps separated by a '-'. (Example: some_file-2018-02-08.tar)
Added a light theme in options. (Thanks to Berion for the design)
Added minor touch controls in options and main menu.

Fixed bug with app.db not being backed up properly.
Use sceIo instead of stdio for i/o handling.
Display instructions in backup/restore screens.
Removed light theme because it didn't fit well, and just took up a lot of space. (There is no longer a theme mode, because this is just a backup tool, we don't need that here.)
Support files larger than 4GB.
Add options to delete backup files from the restore menu. (Press cross to select files, then square to delete.)
Add 11 levels of compression using miniz. (0 being no compression, which is generally recommended)
Add more valuable data to initial backup list. (ur0:/data/VitaBackup/path.txt)