My (mac OSX) wallet got stuck at syncronizing, 150166/193850 and no higher, anyone any advise how to fix it ?

PS for DEV : I upgraded the wallet to 2.0.0 and the wallet gui > help > about the wallet confirms version 2.0.0 but the MAC top menu > B2B coin wallet > about B2B coin wallet gives me a popup window and showing version 1.0 (1)