steam keeps installing an older version of the game

Everytime I install mudrunner on steam it installs the 14.08.19 edition of the game instead of the current edtion of 19.11.18..I cant get the current edition to install of the game....how do I fix it??

I figured it out....I have to start the game thru Mudrunner MOD or it defaults back to an earlier version for some reason...but it works fine as long as I start it in the MOD not Steam...