Ihre Kommentare

Could you please describe what exactly you're doing to lock the program up? Are you using 1.5.7 or 1.6beta3?
If I understand correctly, this is actually already possible.
You actually can select more than one note via Ctrl+Clicking on them. Or if you want to tag all untagged notes, select "Untagged", then "Edit/Select All", then "Edit/Tag".
Or, from the keyboard [assuming version 1.6 Beta2+]: Ctrl+U, Ctrl+A, F4.