Well, first of all: thanks for all your comments! It makes me happy to know that those 5 months weren't just for making a script no-one would care about.
As for the next version, I can already say that it's very likely that it'll carry the version number 1.1 and that the main change will be a Log Merge feature, enabling you to select two log files (e.g. "user@hotmail.com.ple" and "user@hotmail.com (2).ple") and let you then merge those logs into one, sorted-by-session-date log file.
The main reason I'd like to implement this, is because some people have logs on multiple computers and may want to copy them all to one place and merge the related log files (same month, same e-mail). The GUI is almost done and pretty much the same as the Encryption window, so now it's time for me to start coding the merging functions.
I'll try to keep you up-to-date as much as possible on this, because I think I already kept this project secret for too long.