Mac ver 2.5

total failure to open any projects or files
trying a re-install

Does the program even open? If not, and if you didn’t download from the Apple app store, you might want to check your security settings is Sys Prefs…


Repairing Disk Permissions via Disk Utility might also help.

If you were upgrading… … er-upgrade

A reinstall sounds the best thing to do. Scrivener 2.5 has been in use for a few months now, and there are no known major issues with it, so a bad install seems a good bet.