Unpack the contents of the wiki sub-folder from the archive into your MoinMoin wiki folder. This should create and populate the wiki/htdocs/_uploads and wiki/htdocs/_resources directories (the latter contains images for the MoinUploadsCenter GUI) as well as add some files and folders to wiki/data/plugin/actions.

  <!> The code assumes that the current working directory (i.e. os.getcwd()) is moin's root directory (i.e., the one that contains the folder wiki). Should this not be the case on your machine, adjust the variable WIKI_DIR near the top of MoinUploadsCenter/main.py. 

You'd probably want to delete the sample content from _uploads at some point in time.