Pro Tools includes a DRM rootkit, PACE, that serves two purposes:
1. To cripple your computer so that you can only do what the developer chooses to let you do.
2. To force you to pay for an upgrade to the product every time you update your OS, even though the application itself would otherwise continue to work as well as it ever did.
You can either accept those terms, or find some way to get your work done without using Avid products.
I suppose so. All my virtual instruments work as plugins to music production applications such as Cubase, Pro Tools, Sonar, etc., as well as standalone applications outside of ProTools. Prior to upgrading to Lion, these instruments did both. Post install of Lion, an "Incompatible Software" folder was created containing the following files which I can only assume are the drivers for my MBox2 digital audio interface: