[Plugin: Transposh WordPress Translation] Can't select languages in the config page

I don’t know what’s wrong, but I haven’t seem to toggle any of the language buttons for activation in the Transposh configuration area. I can drag them, but I can’t select them. If I click on the buttons, nothing happens. Also, do I need to have my own Google or Bing API keys for the automatic translation to work?

https://www.ads-software.com/extend/plugins/transposh-translation-filter-for-wordpress/