You have some other errors that contributed to error 910( aka ...Missing...):
*.traj file corrupt
*.min.val file corrupt
*.log.bz2 file corrupt
Generally, this is all connected to memory setting being too tight, or too high overclock, that result in slightly instable system - back off a bit, it will make huge difference in long term stability. Another thing you might try is to set priority to 5 or 10 - doesn't impact folding speed if client is the only application running, but helps system assign enough resources for HD access.
If any of previous errors occur, you can safely delete offending files, make a copy of some other files with same extension, then rename those copies to be exact as the files you deleted - method proven quite a few times.
If you've been folding online, and have no buffered generations at all - don't think anything can be done about it.
Error 910 can sometimes be avoided by running foldtrajlite -purgeuploadlist 1 in folding directory until error is gone and client starts to upload/work normally.
All these fixes have been posted on this forum before, and there are some explanations on DF bugs page, as well - please check those resources in the first instance.