I tried to install some plugins, so I've them in the flash disk, and connect it to the receiver, I got the menu to install which I did, but I'm not seeing any of the plugin that I have installed and now I'm getting a message saying that the folder /var is almost full.

How can I clean it?
I saw a file called "del_var_FOREVER.HD7830PVR.rar" what will it do exactly?
If it removes all what's on my var folder, will I lose something?