Release Notes: http://64drive.retroactive.be/rn_fw_200.pdf
Read this first!
Be sure to be running the latest 1.12a menu.
Easy upgrader: http://64drive.retroactive.be/64drive_firm_292.exe
Raw file for use with USB loader: http://64drive.retroactive.be/64drive_firm_292.bin
You will need Windows, a VM may or may not work. I'd suggest borrowing a Windows machine if you don't have one.
Things I'd like feedback on:
1. Test all the CF, SD cards you have. If you have a small 128mb card around somewhere, try it and make sure it works.
2. Play as many games as you can, making sure the save data is never lost. The flushing process happens about 1 second after the game finishes. Specifically, test Donkey Kong 64 to see if it loses save at any point.
Also, after upgrading, you can use the new USB loader for 2.xx here: