Thanks for the reply. I had installed V9 when it was released, but it didn't have the presentation mode which I absolutely need for my presenatations, so I never really looked into V9 as that was a show stopper for me. I'm only looking into V10 now because Presentation Mode was reinstated, so I can look at whether V10 could work for me (and I like a lot of what I see). When I installed V9, I didn't even look where it installed the folders, I didn't see what they were named, I'm discovering all this now that I'm looking more closely at V10 as a potential upgrade for V8, which is still my production version. I have imported a couple of brains but the master versions remain in V8 (as I never used V9). V9 must have decided to store my brains into the defaults documents folder in my Windows VM, which points to my dropbox on the host OS, as explained in the post above. V10 simply kept that default (that's my guess). Just so you know, Harlan has started to reply to this in this thread: http://forums.thebrain.com/post/choosing-a-foldername-for-an-imported-brain-in-v10-9830510?pid=1305251884, but he hasn't replied to my last post, so I don't know if he's considering a solution (one of the two I'm suggesting or others) or not.
TB V10.0.32.0 running in Windows 10 Pro x64 Build 1809 with Bootcamp on a 2018 MBP 13" with 16Gb of RAM, 2TB SSD and i7 @ 2.7Ghz.