I thought this was just me...
I saw the update to Facebrick some days ago and updated it. Couldn't see any noticable difference in gui, but saw that I could view all posts now (I have problems with many posts previously just showing up empty, not being able to see the text....).

I did not however notice there was a desktop widget to choose now. Not until yesterday, and this is how I found out

I accidently dropped my N900 so the backdoor flew of and battery went out. I put it back and started up phone and facebrick wanted to connect to internet, which froze the phone from doing anything. And I didn't know why facebrick suddenly started. It all ended up with me reflashing phone and then reinstalling everything, including facebrick. Thats when the widget popped up and I noticed it (got very happy) for first time . Then I also understood why facebrick wanted to connect to internet without me opening the app, but still no idea why the widget got activated from me dropping my phone, when it was not active before on my desktop

Anyway, as it now works perfect, I think the "purging" should/could work, without reflashing the phone. Just get rid of all old 0.5 settings. I guess facebrick stores settings somewhere in your /home/user folder, so try removing those too. (Unless purge does that too? Which I doubt, but dunno what purge does).

Kleggas