I uploaded a fixed zip file for the install. Those of you who have already downloaded it do not have to redownload the file. Delete the following files to avoid duplicates, and you will be fine:
In <Whore Master's Root Directory>\Resources\Characters\
"Girls.girls"
"GirlsAddon1.girls"
"RandomAddon1.rgirls"
"RandomGirls.rgirls"
In <Whore Master's Root Directory>\Resources\Data\
"items.items"
Do not delete the files that end in ".girlsx" ".rgirlsx" or ".itemsx" - the *x files are the new format and are required to run the game.