Insync stopped syncing existing folders after I upgraded to paid version

Hi,
during the 15 days trial, everything worked like a charmed, the app was syncing my local folder with my google drive account. But today I’ve upgraded to the insync Plus version, and I’m not able to sync the same folder again.
The app synced the folders that are new in the main folder, but not the already existing folders that have been modified (sorry for my poor English, don’t know if I make myself clear enough). I think this has something to do with the so called “file compare” feature, and thought it was now available in the last versions of the app.
I’ve tried to downgrade to the 1.5 version of the app (it seemed to solve problem for some users) but with no effect.
I’m using kubuntu 16.04 and here is my out.txt :
Qt: Session management error: networkIdsList argument is NULL
Qt: Session management error: networkIdsList argument is NULL

Thanks for your help,

Frédéric NANNINI

Hi @Frederic_Nannini kindly send in your logs (How to find the log files) via support@insynchq.com along with the link to this post and we will investigate this.