Recently I had an issue where I have created a module extension in Dotnetnuke 5.6.3 and no matter what I did I could not get the Create Module Package link to appear.
One of the first things I checked was the folder name, this was identical.
As a last ditch effort I simply copied and pasted the folder from Windows Explorer path to the extension wizard folder name textbox. Updated the module and there she was, the Create Module Package link was there. Not 100% sure why it didn't work before unless I simply missed a typo.
For the Create Module Package to appear in DotNetNuke, the folder name must match an existing folder in the Desktop Module folders.