There's a bug in the install / removal routine
During installation, the plugin tries to install inotifytools (which comes with stock 6.3+). It skips the package because it's already installed on 6.3. Wouldn't it be better to do a conditional check on the installation rather than just skipping the install? (IE: if unRaid up's the version later on, FIP will wind up installing an old version unless you also update the plugin)
This leads to the second, more serious issue.
During plugin removal, the inotifytools package is removed, with potentially disastrous effects for anything else that might be using it, since the plugin removal is effectively removing a stock OS feature.