[Different versions in Steam?]

Nevermind, I found it. It gives access to the C++ API. 

 

[Different versions in Steam?]

Hi, new to the forum.

I want to purchase the engine in Steam, but I've seen a main version and the professional edition as DLC... I'd like to know what are the differences between both versions and which features I do get if I buy the pro edition. Could not find anything in the store like a comparison table and the prices are a bit messed up (in the store says $199,99 for the pro edition and in steam costs 20 bucks...) so I feel a bit confused.

Thanks in advance!