See if changing the hookingmethod to
Alternate mode works for you, something might be interfering with Plus!.
It is also very possible that Plus! is not uninstalled, you can check by seeing if C:\Program Files\MessengerPlus! 3 and within that folder MsgPlus.exe is still on your computer. If that is still there you can start Msgplus! without reinstalling aswell through taskmanager (ctrl alt del - 1x), in the menu choose file > new task and browse to MsgPlus.exe.
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