I think the OP was confused that there are no .pbl files in the PFC on Github.
I tried using it today and had the same frustration. There are .pbg files and .sr* files so thought I could simply create the .pbl myself and import all the objects into .pbl but the import stops at the first failure so I'm unable to use the PFC in PowerBuilder 2017 R3- or at least not yet.
Has the OP solved this problem?
The note on Github says do unzip a file in the Release folder to get the .pbl files but I couldn't find any zip file.
I'm wondering if I need to set up Git and have Git load the objects into PBL's based on the pbg file. I've never started without a base .pbl file and suspect the OP hasn't either.
Anyone? Us original PB developers are getting to be old dogs- these new tricks are frustrating sense the frustration of OP too, demoralizing. Not as easy as we thought.