This version only works with Contao versions greater than 3.3. It has already been tested with the Contao 3.4 RC1 so you are good to update when Contao 3.4 stable is being released. For Contao 3.2 we will provide you with bugfixes via Isotope eCommerce 2.1 until the end of its Long-Term-Support in June 2015.
You can find more information regarding the improvements in the announcements of Isotope eCommerce 2.2 beta1 and Isotope eCommerce 2.2 RC1.
The release candidate 1 of the Isotope Migration Tool will be announced this week in a separate blog post!
Have fun with Isotope eCommerce 2.2!