Version 3.1.1 still remains the most stable release for your hardware, but bear in mind you will need to use zadig to re-associate the device with the ftdi driver instead of WinUSB when you go back to it. 3.2.0 did not work at all for AMU devices so if you're trying the new code, use 3.2.0. 3.2.1a is just a binary built for older versions of ubuntu and no different to 3.2.1.

Compiling it yourself will not make it more stable as my builds should be optimal - the only advantage to building yourself is you can build a stripped down version containing support only for the hardware you want to use, and assuming you're on windows, compiling it is FAR from trivial.