Next-Action is to wipe and re-install

I tried to install Next-Action demo application on my 8820 (4.3) and it caused the dreaded App Error 200. I deleted the applicaton, using the desktop manager but I am assuming that it has done something irreparable, as I am still getting that error. I am unable to restore from my backup. It seems that a complete wipe and reinstall is the only course of action. So much for Getting Things Done now.
I followed instructions on BlackBerryFAQ.com and with the help of this awsome utility JL_Cmder I was able to revive my handeld. I will have to find something else for Getting Things Done.