Having issues with plugins Language

I am having issues and trying to figure out what to do. We just purchased with you guys and on friday I uploaded the wpmudev - dashboard and was using it fine and loved it. Got up on saturday and started looking for a few more plug ins and I noticed it wanted to charge me (I was looking from within the wordpress site of the client.) it was like 24.99 for multi site and for general Language plug in. So I emailed your team and they stated that no there must of been an issue so then I checked again and I could use it with no charge... The plugin is Languages for WordPress BUt it won't let me install the plug in directly from the wmpu dashboard it just say download or install but when I click install it doesn't do anything so I downloaded and tried to manually install and it said. "Error are you sure" Maybe i'm doing something wrong?