According to @Frew’s post the diff between v3 and v4 is no difference.
IIRC (and based on this post) the difference between v2 and v3 are great (i.e. there are different profiles for a specific reason, different settings, etc.) and the two are not mixable. Hopefully someone at FL can address why u got v2 .
EDIT: nvm I found the answer here
In short v3 was recalled, so v2 is the current version of clear!