Thanks for the brilliant idea!!!!!
I did find the 2.2.7 version for my DS215j. I installed it and it works!!!
Here is the link for the Synology DS215j https://download-cdn.getsync.com/2.2.7/Synology/bittorrentsync_armada375_2.2.7-1.spk
Is there a way to backup all the links i have setup to sync to the NAS. Because it is all empty now and have to reconfigure all the sync tasks.