2.06 and 2/07 not working مقيمة بـ 5 من 5 نجوم

I'm getting the same error everyone else is. (various line numbers, 2, 303, 323, etc.)
<br>The account chooser will not operate.<br><br>I managed to downgrade to 2.05 and that worked, but then it updated itself again to 2.06. I tried 2.07 and it was the same problem. I'll try 2.05 again, and hope this version sticks till it gets fixed.<br><br>I'm on a Macbook running 10.6.8.<br><br>This is an otherwise excellent add-on. I use it daily. I hope the issue gets resolved soon.

Update - anyone reading this, Mime's solution below did the trick. Thanks! You get a fifth star!

هذا التعليق كان على إصدارة سابقة من هذه الإضافة (2.0.6) 

Sorry that you've run into this issue. The new version of FireFTP is doing migration of an old account format to a new one. Unfortunately, there are some illegal characters that make it difficult to upgrade to the new format that Mozilla now requires. (specifically, the combination of trying to convert international characters and the '%' character creates problems).

If 2.0.7 isn't working for you, you can try the following:
- find your profile folder, here are instructions: http://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data (if you're on a Mac it'll be under: ~/Library/Application Support/Firefox/Profiles)
- find the file in your profile folder called fireFTPsites.dat
- remove the '%' characters found in the file.
- install version 2.0.7 and readd the % characters back in later as needed. (not directly into the file, but via the regular FireFTP interface).

Again, sorry for the inconvenience,
Mime