I tried it with Firefox 68.8 ESR and their it downloaded without without the .txt & .png
With Google Chrome & Brave Browser for Mac I can't access you site "http://www.makehumancommunity.org/" ?!?
My suggestion is that you would store a couple set also as .zip file (incl. all texture files)
In the mean time I tried to manually install the clothes in the MakeHuman.app but the aren't recognized by the GUI?