Yes it could be, Watch Face Format started with 1.4.13. You can’t open newer projects with the older version of WFS.
Try opening them with the 1.3.13 version then a newer version. Peter uploaded a Windows version 1.3.13 In this thread
If you need Mac there is a copy of that too, just search in this category for 1.3.13
Let us know if that helped.
Ron
Samsung Developer Relations