The latest 4.2.2 version removed the display of the complete csv path name. I use multiple MSTS installations (having had TOO many re-install MSTS and start from scratch situations in the past). Often I have the same route installed a number of times. For instance I have a CSX, & ATSF/SP versions of Rich Garbers Ohio, as well as the original. I probably have half a dozen versions of Canton...
I cannot now tell which route I'm looking at... All the csv files have the same name. In previous versions I had the MSTS folder name to identify the route... It's not a killer as I can use the browse button to get the full path, but I thought it was worth mentioning that for me this feature is not working as intended...