I don't have my memory card yet, so I'll have to wait until tomorrow to reinstall the firmware. The only reason I deleted the system folder is because I had copied it over in the first place and all that I saw in it was what I had copied. I had read here somewhere that if you didn't like the new FB reader you could just delete the folder, but I guess I read wrong or misunderstood something.
So is the new FB 0.9.1 not ready in English? How about 9.0? Is that extensions.cfg file OK to use? Assuming I get brave enough to ever try upgrading, that is.
Thanks for the reinstall suggestion; I'll definitely try it tomorrow.