Installing for first time

[joe]

Hi,
I'm really new here.
I have just downloaded Wings 3D.
I now have a file wings-1.5.4-linux.bzip2.run
What the heck to I do next?
When I click on it, I get:
Could not open the file /home/joe/Downloads/wings-1.5.4-linux.bzip2.run.
gedit has not been able to detect the character encoding.
Please check that you are not trying to open a binary file.
Select a character encoding from the menu and try again.

I am running Mint Linux.

Are there no instructions anywhere?

Sorry for such a lame beginners question.

Joe