Reality Factory

I'm sorry if this has been asked before, but Have a problem.
I have compied my level, and it comes up with the message box "would you like to preview?", but after selecting yes an error message appears that says this:
"Windows cannot find c:\Program files\realityfactory.exe"

That directory is not where I installed reality factory, so how do I change this back?

Hi I had this problem a long time ago I fed it by putting the files where it says it's looking for them or you could reinstall rf

I assume that you've renamed your game's executable from RealityFactory to the name of yor game, rename your executable back and that thould fix the problems