Hi Remy,
You should return your protocol and other files that Injoy firewall changes back to original so the injoy drivers and settings are removed.
You will find the uninstall command file in the documents somewhere, not near my server at present so cant check what it was.
The uninstall procedure will not delete any files, simply return the ini files back to normal. After you upgrade ArcaOS, simply rerun the install file.
Same procedure applies if you want to run mpts to change network drivers etc.