We are on Sugarondemand so we don't upgrade the system sugar does. I don't believe the next update is for some time.
No new modules or changes recently, the only thing that did happen and this is when it broke was my email account password expired and I changed it to be a generic one, I tried changing it back today but that didn't work. However those changes were made in GMsync not sugar.
Is there anew version of GMSync as the one we have is 1.9.7 which was emailed to me after 1.9.6 didn't work. I can't seem to find any download links for later versions.