The latest version is 2.0.7.
If you buy the license, you have access to the latest version (and to all below versions).
This will be applied for 1 total year, so from the start of your purchase, you will have access to the latest releases for 1 year.
When your license expires, then you won't have any access to upcoming new released versions, but still access to all those versions you had access to prior expiring.
You would need to buy an extesion for 40$ if you wanted to have access to newer versions (after the 1 year), but you dont need to. You can renew your license whenever you want or not at all.