OK! So you can use its counterpart, scp, to copy files from your PC or whatever to Vera.
You need all the files in the GitHub repository, aside from the icon, and copy them to Vera's /etc/cmh-ludl/ directory.
Once there, you can manually create the plugin using AltUI's Create command on the device page. You need to specify the D_AltAppStore.xml and I_AltAppStore.xml files and give the plugin a name... perhaps AltAppStore.