Hello,
thanks for your report, please thanks to stay on topic (i.e. forza plugins) and create a new one if you need assistance.
[OFF TOPIC START]
> receive this error when trying to update the softwareThis is NOT an error from the auto-updater, these files contain YOUR OWN custom settings and are protected so that they can't be overwritten during normal update operations, use the
Advanced Options tab to force update those files or to revert to default settings, attention, all your changes will be lost.
[OFF TOPIC END]
back to your report, fm7 works fine with the shiftlights (rev led) of your 488 wheel but your settings need to be fixed:
the IP should be ALSO the localhost in forza game settings because you're running it on your PC not on a Game Console
config with PC running Forza 7 and SLIMax Mgr Pro with your TSPC loaded with your FErrari 488 wheel
everything is recognized by Windows and obviously by SLIMax Manager Pro
Forza 7 plugin ACTIVATED and with default settings:

IP: 127.0.0.1
port: 7777
Forza 7 game settings
UDP telemetry allowed
IP: 127.0.0.1
port: 7777
check your UDP configuration,
test F7 with SLIMax Mgr Pro + your TSPC 488 ferrari wheel ONLY,
no other app should poll the same 7777 UDP port
check your firewall rules or disable it as you may encounter the MS bug related to "network loopback isolation" of UWP apps... FM7 is unfortunately an MS UWP app...
restart your PC after any firewall settings change
Hope this helps
Regards,
EKSIMRacing Team