I am not sure which of the three I am using.
Actually I can probably break it down to 2.
(I use Catlog->Product with Attribute Stock) to add my product attributes.
I do not have the one that you have to put into the quanity into the actual attribute itself. (Dealing with sizes wouldnt make sence for that)

I tried to edit admin->products_with_attribute_stock.php to see if there
was any version info in there but I did not see any.

I also looked at my backup directories where I save all the mods i use.
I have stockattribute_by_danielcor_3.01 & stock_by_attributes_4.4 downloaded.
I could not be 100% but I think I am using 4.4