Transmogrification feature?

Hi there. I'm setting up a beginner's game using both Mines of Phandelver and the Essentials set as each has things I think the other can use, but I'd like to amalgamate them. I read about the transmogrification tool that apparently only comes with Pro levels, and am wondering if it works, if it's still available and if it is indeed part of Pro as I didn't see it listed on the subscription explanations. 

Yes, it works fantastically.  About the only thing it can't transfer are Macros (but I have an API script that can help with that). It is definitely still available, and does require a Pro Subscription.

Thanks for the info! That'll help a lot.

No problem!

Oh, I forgot. Once I’ve changed things, does it remain that way should I change or end a subscription?

Changing your subscription won't affect the state of any games, only the capabilities you have (API, Transmogrifier, Dynamic Light, etc) with those games (and your storage space).  You could bump to Pro for a month, move a bunch of things, use API scripts to set up lots of stuff, then drop to free and just use things in their current state.

Figured, but I wanted to check on that. Thanks very much again!