You should be able to fix things by double clicking "FIXME" in the UFT directory.(Usually in C:/UFT, but you might be ROOTS4, ROOTS5 etc.) "Fixme" should fix the corrupted program file that's giving you the "other application running" error and you should then be able to open UFT.
You said message that you followed my instructions and now you get that error? Did you get the error AFTER running the Check or before you got that far, maybe after making backups? In either case, if after running FIXME you find you still get errors in your project, there are two things you can do.Either restore your project to an earlier backup that didn't have errors and reenter anything you've added since that backup or ... I have a friend who can probably help you. Contact me by email.