I had tried one of the later betas of v2 and didn't like the feel of it. I uninstalled and went back to 1.75. All was well 'til yesterday when MBAM sent the program update along with the database update. I was notified and agreed to the update, but it was a mistake on my part. The UI is still just as clumsy, and settings are difficult to find and understand. I spent a good five minutes looking for a scan log file link in the UI, gave up, and manually found the log in the MBAM folder. I was never able to get the context menu scanner to work properly: sometimes, MBAM opened but just layed there; other times MBAM never even opened. Shellex and Ccleaner verified MBAM's context menu existence, but it still didn't work.
V2 is still a beta with many bugs to be worked out, IMHO. I just ask that MBAM continues support for v1.75 until these problems are resolved, and doesn't force the upgrade on it's users.
I am currently using SAS and EEK to supplement Avast on my personal XP32 SP3 system.