After you run the installer for the first time, the above files will be placed into the back-up folder (BACKUP-Reunion). You may also create this folder and place the files into it before running the installer. The effect will be the same. The files from the backup folder will always be used in preference to the ones at the default locations.
The best way to install The Reunion (so that you can reinstall time after time) is to install all non-conflicting mods FIRST, starting with clean files. From there, place the correct files (noted above) into a new folder "Backup-Reunion" inside the game root. Each time The Reunion is installed, it will then use those files, saving you the need to mess about each time.
Install: Run the installer.
Reinstall: You can install multiple times without any side effects.
If you wanted to include something that you missed
the first time, re-running the installation a second time
should pose no problems. Running the installer a
second time will NOT overwrite anything in the backup
folder.
Uninstall: Select uninstall option.
The backup folder requires manual deletion to ensure
that there are no problems. If you choose to uninstall,
all other options will be ignored.