texregency

I am trying to install stardock windowblinds 8, but my computer says to remove windowblinds 7 first. There is no file, no program, no reference to windowblinds 7 so I cannot remove something that doesn't exist. I have tried stardock technical support but they have no answer to the problem except to reformat and start over which I do not wish to do. I suppose there must be some sort of registry reference still in the registry, but I can't find it to remove it. The error message says "remove windowblinds 7 first and then install windowblinds 8. I have done many searches for solutions, but none of them work. I am using windows 8 home premium, 4gb memory, plenty of hard drive space.