Oops. My fault for allowing the multiple decimal points.
If you have a recent backup, you can do a selective restore from it using the desktop manager.
Open "Backup and Restore" and click on Advanced. On the left side, open the recent backup file, navigate to SignalLoc Options1 and press the ">>" button. You should now be able to get back into the app.
If you don't have a backup, I'll make a fix and get it out tonight.