As is often the case after a significant new update, several broken
features have been reported in these groups. Notably in the "Calculate
Expression" and "Match Brackets" features. These issues have now been
fixed in a slipstream update (v22.214.171.124) dated August 16, 2012.
If you have the paid edition of version 7, simply download the
slipstream update through NoteTab's "Check for Updates" feature, which
is available from the Help menu.
You can download NoteTab Light and NoteTab Trial from this page: