From their website:


13-March-2009
The new version of AQUA@home's application (v2) is nearly ready. We are currently running tests, and hope to submit new work units by Friday. This version is not compatible with the previous one so we will have to cancel all current work units before using the new version. Please abort any AQUA work units that are running on your computer and will not finish by Friday.

I want to stop Primenet and set up for Aqua again. How would I do that?