MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
I had the same issue but was able to just tighten the 6 roller wheels to remove the wobble.
This guy had the same problem as you, check about 16 mins into the vid for his solution.https://www.youtube.com/watch?v=P25vxxEYRLg
Once done I had to then auto home the nozzle , level the bed using the paper technique, then auto home and repeat 3 times to get the bed level right.
I'm now getting some very good prints. I tried a layer height of 0.05 ...this will blow you away, takes a long time though but way better results than my Anet A8. Plus there is an option to change filament, I've been experimenting with multi coloured prints :-)...love this machine....