This is really getting kind of sad for a piece of commercial software. We live in the days of hundreds of thousands of files and muli-hundred Mb/sec internet connections - and your software is seemingly optimized for transmitting a few hundred punch cards at a time. This is clearly not a major issue - someone has hacked a fix themselves for Windows. It's present in just about (if not every) other synchronization / backup product I know of: Backblaze, Crashplan, Transmit and others. Your value proposition is that you can talk to multiple Google accounts - which is why I bought it. But that's pretty much neutralized by the fact that you can't talk well to even one account.
Decide if this is a hobby or a business and listen to your customers. What they say is important is what's important - not what you think is cool.
I certainly can't recommend this to anyone until this simple problem is fixed - almost two years after just this thread started.