Plugin has been re-coded from the ground up to be a lot smoother and with added/requested extra features.

NOTE: Old configs and backup data will need to be removed for the new version to work. I will offer no support for old configs or people trying to use old backup data.

The majority of the plugin code has been re-written to SonarLint coding standard.
New main menu to show all online players (use just /ir).
MySQL support added (requires testing).
YAML backups for players are now in their own individual save files for each backup to reduce the risk of corruption.
Inventory is only saved to the file if there is anything to save reducing file size in backups.
More plugin tasks including saving data and reading backup data is now asynchronous to reduce server lag.
Added config option to enable the option to restore whole player inventory on one click.
Ender chest backups are now accessible.
Config file has been cleaned up to make it easier to read.
Can now set the number of lines visible when browsing backups to help reduce lag further.
Messages have been moved to a separate YAML file for easier customization.

Please open issues for feedback or bugs so that I can resolve them before final release.