@MarkSealey, very good places to start and questions that need answers.
@lightspeed, are your resources on a network drive, thumb drive, external drive, dropbox or other file service?
There was an issue with RW 6.3.4 losing stuff, but that is explained in the forum on what to do for that here.
6.3.6 GM (Beta software version - Gold Master) has fixed a bunch of errors and issues, it can be downloaded here.
Brad