Trouble with this approach is that the program may have left some tags in your registry and in your start-up options - once you delete the program, you could end up getting loads of error messgaes on boot-up. I suggest you start off by re-installing the program to patch the uninstall facility. You should then be able to uninstall it directly. If this fails, start off by changing the name of the program folder and see if Windows loads without problems. If it does, you will be OK to delete the program folder; if it does not, you will have to correct the folder name.
Of course you can always remove the program from the start-up menu and the registry if you're brave enough - there are loads of us able to give you separate advice on this if required.