How do i "wipe out" the old .NET runtime though.

Aplikacja: MFBot.exe Wersja architektury: v4.0.30319 Opis: proces został przerwany z powodu nieobsłużonego wyjątku. Informacje o wyjątku: System.NullReferenceException w de.mfbot.MFBot_NG.Basisbibliothek.Log..ctor(System.String, Boolean, Boolean) w de.mfbot.MFBot_NG.Basisbibliothek.Log..cctor() Inf...

still, it doesn't pop up. I don't know what do to.

Now it doesn't even show up. Only it shows in task manager. The bots aren't working.

20210331 16:07:18 Warn Core Form is already running. Message: Form is already running. HResult: -2146233079 Source: Basisbibliothek StackTrace: at de.mfbot.MFBot_NG.Basisbibliothek.BaseProgram.RunInNewThread(Form form, Boolean isBackground) in File110:line 482 at A.VTI.X() at de.mfbot.MFBot_NG.Basi...

So, I used MFbot for few hours. When i wanted to turn it on it didn't. There was only a splash screen. However, I saw that MFbot was in still running (as a process). What do I do?