Installing Mohave was a disaster, as many of my older graphics programs quit working. Read where some like Mohave...many hate it. Having to start over, we installed High Sierra on a new hard drive and updated OS 10.13.1 to OS 10.13.6. Restoring files from a backup, FCPX already puts Motion Templates in Movies with its sub folders: Titles, Transitions, Generators etc. That is why I considered deleting FCPX and reinstalling it with the 10.13.6 update. I was also able to update FCPX from 4 (OS 10.13.1) to FCPX 4.6.
I also read where if you do not see the "Transitions" folder in the Motion Templates, you need to make a folder "Transitions" etc. and put it in there. No where in print does it tell you to localize a "Transitions" folder, so I will have to learn how to do this or check to make sure the sub folders are localized. Something is going on that I do not understand, and I cannot believe something like this can be so difficult and time consuming. The FCPX tutorial videos make it look so easy--very frustrating with Apple and Adobe screwing us for more money every day.
Thank you for your help.