Hello everyone,
It appears that the latest patch disabled Platform Builder Pro for many users. So I have reverted back to the previous version. If you want to keep working with the patch, then it will be available as a public beta. You can access this patch by going to your Steam library, right click on Platform Builder in the library, selecting "Properties," then "Betas," and choosing the public beta. That will install PB 10.4.1 for you.
Sorry for the confusion. Hopefully for everyone I can figure this out soon!
TingThing
Changed files in this update