I am also trying Synchron player again - have lots of libraries for it.. It sounds great and I'd love to use it..
Currently trying th program up the proper Synchron strings - but still keep rememering all the issues with Synchron.
VI Pro is still the go to though mainly due to the problem addressed in thsi thread - I can't control Synchron from ipad.
The second reason for not using so much is because the dynamic range doesn't work properly in Synchron - never gets quiet enough - VI pro is perfect in that respect.
These gremlins have come up many times since the inception of Synchron - I wish they'd get a bit of attention from the devs..