Quote from dotTech
AppBooster actually comes in two editions: Free and Pro. On a similar note, currently AppBooster is v2.0. Today's promotion is of AppBooster Pro v1.3. While AppBooster Free is v2.0 now, I talked to a representative and I was informed that even though AppBooster Free is v2.0 while this promotion is of AppBooster Pro v1.3, AppBooster Pro v1.3 still has the following advantages over AppBooster Free v2.0:
* AppBooster Pro v1.3 can create multiple profiles while AppBooster Free v2.0 can only create one;
* AppBooster Pro v1.3 allows users to include custom processes/applications to be killed while AppBooster Free v2.0 does not.
That said, though, I noticed AppBooster Free v2.0 has some advantages over AppBooster Pro v1.3 also, such as two new features Memory Booster and Windows Sidebar and Tray-Gadget. So depending on your needs, you may find AppBooster Free v2.0 is more beneficial to you than AppBooster Pro v1.3. AppBooster Pro v2.0, of course, is the best out of all three with the most features.