Hello DemieLune and welcome to the ArtRage forums
Whilst v3.5.12 is the most resent version of Studio Pro it is not the most resent version of ArtRage, indeed Studio pro is no longer developed beyond being kept functional.
The most recent version of ArtRage is ArtRage5 which was released 6 months or so ago.
For a look at the differences between all the currently available versions of ArtRage have a look here: https://www.artrage.com/product-comparison/
It’s also worth mentioning that registered owners of past version, like Studio Pro, can get a discount when upgrading. See here: https://www.artrage.com/upgrades/
Hope all that was of some help to you.
Maker Of Replica Macoys
Techie Stuff:
ArtRage 5.0.8 ~ 15" Macbook Pro + 22" HD Monitor ~ macOS 10.13.6 ~ 4 Core i7 3.1GHz CPU ~ 16GB RAM ~ Wacom Intuos4 M and a Spyder4Pro (to keep the colours true!)