I'm glad that got you up and running!
If you search your system for
.phd files you should locate the original database. I use a free tool called
Everything which is lightning quick, but you can search using File Explorer. The default folder should be
\Pictures\PhotoDirector13.0\{User name}
If you use OneDrive, it will be in the
\OneDrive\Pictures\PhotoDirector13.0\{User name} folder by default. Having the database file on OneDrive will also ensure that you can restore it from an earlier version in case anything goes wrong down the road.
As far as being "safe," PhD doesn't ever modify your orignal photos, and the only things stored in the .phd file are the folder locations of the clips you've imported along with the various edits you've made so far. Even if the .phd file is completely deleted and you don't have any kind of backup, all your photos will be exactly where they were and will remain in untouched condition.