I cannot get forge to open!

I download the zipped rar folder but the only thing in it is a file that i cant open, please help?
the name of the file is
"forge-1.2.6.tar.bz2.tar"
the name of the file is
"forge-1.2.6.tar.bz2.tar"
High Quality Resources for Collectible Card Games
https://www.slightlymagic.net/forum/
https://www.slightlymagic.net/forum/viewtopic.php?f=26&t=6923
You may need to extract it twice, once from a tar.bz2 to a .tar and once from a .tar to a folder.thevisi0nary wrote:i have winrar, its the file inside the folder. After i extract it its an unrecognizeable file type.
thevisi0nary wrote:is there anything explaining how i do this?