Custom Backup Tool v1.1

Changelog:

1. The program will now copy files, even if they are in use by another process, thanks to the ROBOCOPY command on Windows.
2. The program now works as intended - it no longer puts the copied files in folders named after the files themselves.
   Not even I know how that got by me, considering the prior testing I did, but oh well.
3. Specified two more hardcoded paths (Program Files (x86), and Program Files).
   If this still leads to issues, then I will borrow some code from my Accurate File Finder and have it search for any instance of javaw.exe in the computer.
4. Whenever it encounters any exceptions, the program will put their messages (not the whole stack) on a file named errors.log, instead of displaying an error message, which would interfere with automatic backups.