Creative Cloud installed its own update 126.96.36.1995 this morning on my secondary PC. Since then, the file sync doesn't work anymore in this PC with already existing files on cloud. For instance it doesn't download the files modified or created and uploaded on cloud from my primary PC last evening when update were still not applied (and yes, those files/modifs are on the cloud: I see them using web interface). Also, it doesn't upload modifications I make now on existing files from secondary PC.
The only thing that work is creating new files and modify them from secondary PC: in this case, they are uploaded.
Problem seems to be solved... I dont know why nor how! Files that were not able to synchronize since this week-end on my secondary PC are now correctly synchronized. It took times but there it is!
Actually, there were a period of time on last week-end during which only one of my two PCs received the update. It seems the concerned files are precisely those I manipulated during this period. So maybe the difference of version between PCs is the cause?