If you have root, and SSH installed, you may be able to login to a command shell via xterm (or putty on windows), which would let you run the commands to get the code.

If not then you probably need to reflash. If you have been using your tablet hard, and have added and removed lots of apps, and have most if not all your important info on card, then you should be OK.

Don't forget that when you restore from backup these days, you can be selective about what you restore, try a full restore skipping the settings.