Protecting Projects so they can be reopened if necessary in FCP X 10.0.2?
With the legacy FCE/FCP you could copy the tiny project files before updating so that should there be a problem with the latest FCP version you could resort to using the old one.
Can this be done in FCP X?
iMac, Mac OS X (10.6.8), FCE 4 + FCS 3 . . . Little Knowledge, Many Opinions.