As many people have stated on the application’s store page, gResistor doesn’t seem to start on Ubuntu.
If you run the program from the command line, you’ll notice that there is a missing library.
$ gresistor <Error output here . . .> ImportError: No module named glade
Install the missing Python 2 library
sudo apt-get install python-gtk2 python-glade2
After installing it, you should be able to launch via the GUI or command line.