When i try and open up my saved PNR's i get a error -

Unable to start [C:\Program files\KVS availability tool\openurl.htm]
[Shell Execut] Error 5


This has got to do with me installing Mozilla Firefox on my computer and then uninstalling it. I know its my fault by I can't figure out how to get KVS tool to make IE as its default Internet explorer.

Have tried to update with the latest version and still facing the same problem. Can you help?