Whenever I try to make a cameo with the cameo generator.. I get 'Invalid Filename' whenever I try to do anything.. IE..

I open a SHP (let's say 2TNKICON), and am planning to make it into a cameo. I go Ctrl-G, and an error message saying 'Invalid filename.' pops up. I click ok and whenever I do anything (ie, add a letter to the name of the text, change the cameo-type, change background), I get the same error message.

Edit: reinstall fixed it..

O_o