Why is it that whenever I move my USB disk drive (containing all my PortableApps, including Portable Thunderbird v17.0.6) from one computer to another, I always have to go through all my folders and rebuild the summary files? This is tedious (I have a LOT of folders) time consuming and a real annoyance. That is because I HAVE to have the summary files rebuilt before I can download new email from my server and SEE what new messages came in. This is a bad design and really needs to be addressed, especially if the developers are going to claim that they have a useful and portable version of Thunderbird.
Marc..