Note! This review was written for a previous version of this file!
"GroupTool" is a very nice App. It adds a number of group managing abilities, like (un)hiding groups, viewing the contents of a group and ungroupping only selected files, so you don't have to delete unwanted files after ungroupping any more.
I found only one annoying bug in v1.0: when ungroupping programs, they are unlocked, so that you can edit them on calc.
I really recommend this software. Although some improvements could be made and some features could be added, this is what your calc needs.
Interface: 9/10 nice and clear
Usage: 9/10 very easy to use
Usefulness: 9/10 has many useful features no other program has
Bugs: 9/10 very stable, only the mentioned bug found; the 'Select Group' screen is a bit slow