Hi Marcello,
If Thesis 2 follows WordPress standard templates for post type archives then yes, it should work just fine.
It’s really not a big deal to just try it out yourself really 🙂 Just install and activate the plugin. Head over to settings and setup some basic stuff and give it a whirl. Shouldn’t take you more than 5-10 min. If it doesn’t work just remove the plugin and it’ll be like nothing happened.
If you do, please post your findings here for future fortune seekers as yourself 🙂
Thesis has it’s own templating system which is why I asked. I am wondering if you know of anyone using Thesis who has had success with this plugin?
Sorry I do not. But I can’t imagine thesis moves away from WordPress core templating completely.. as long as they don’t use custom URLs for a CPT archive you should be fine.