Euro Truck Simulator 2 V149223sp2p Work -

If you are currently on a newer version (like v1.50 or v1.51) and wish to return to v1.49 for mod compatibility: Euro Truck Simulator 2: 1.49 Update Release - SteamDB

The specific build includes critical bug fixes and optimizations over the initial 1.49 release: euro truck simulator 2 v149223sp2p work

But what does this string of characters mean? Is it a legitimate version? How does one get it to work ? More importantly, is it safe and stable? If you are currently on a newer version (like v1