Alright, I hope I get a response to this ASAP. I purchased Arrowchat a day or so ago. I installed the plugin and it worked fine, then when I changed the settings, the whole website was corrupt, database and all. When I attempted to log in, it would have 'code' over the whole interface. Any way, I rolled this back to an earlier version of the database and uninstalled the chat, and it happened again. Now I have actually moved server, keeping the same domain, etc. and it won't even install now. It is saying 'Invalid Plugin Archive'. This is coming from a totally new server, the same domain, and a totally new download, as in a fresh one. 

Also, the inability to log in to arrowchat to get plugins is rather annoying too.