Ravenmore yes there is, you have to go to one of your products (in admin) then look under "version" (in green header) there is normally a "1" , click that, and then you have the option to upload again, you have to select "update to existing version" , once uploaded, i select the new version as the default one, even if its in approvel state, (it will read v2, but its the updated version)
if you want to keep the current version, like v1, v2 you choose upload new version and give it a name