I cannot run flightsim anymore.
I have tons of payware add-ons still on it and worst of all I cant reinstall it.
Anyone know what the problem is?
Calm down and tell us in detail what's happening.
If you are getting any message windows tell us exactly what they are saying.
I am going to guess nere. You are getting a message that the version of fsuipc.dll & FS are not compatible.
If that is the case, most likely you have FS9.1 and some program overwrote the fsuipc.dll you had. The solution is to go to
http://www.schiratti.com/dowson.html and get the current version or latest beta version.