There's bound to be a few problems - that's why this is version 0.4! For those of you that are having issues it would be helpful to receive the log file.
For Vista this is stored in the directory shown - adjusting for your user account. For XP users it should be under your "Documents and Settings" folder rather than "Users"
Email a log file to support@t6analytics.com with a few details (won't install, error messages, a screenshot if possible etc) and I'll take a look over and see what I can do.
Thanks!