New Features:

1. Saved comments are now backed up.
2. Multireddits are updated if they already exist when restoring.
3. Multireddit's description and visibility are now backed up.
4. Implemented config.ini for configurations.

Improvements:

1. Single script for all operations.
2. Implemented backward compatibility for old backups.
3. Dependencies can be installed through requirements.txt.
4. Ask for confirmation before clearing user data.