@DTLow I am using evernote on my laptop as well as on mobile (only for reading my notes). Laptop for data entry and I work on OS window 8. Since backup is paid feature and I was not aware that such an option is available for now I have rewritten my lost notes. If the need ever comes I shall subscribe thank you.
@TK0047 Hey there, yup that problem had happened to me on 6.8 version. I have uninstalled it and downloaded 6.9 version and installed it (*I did not update since I was not sure if the bugs from 6.8 would be removed so I just uninstalled 6.8 altogether - ** sync the data before you uninstall). Its been 4 days since I switched to 6.9 (have worked on it for almost 25 hours now) and fortunately no issues till now. Also now I make MS word documents as back up just in case. Ctrl +A , Ctrl + C and Ctrl +V = no future frustrations. Please try that
Hope this helps =D