The OS is Sierra 10.12.6 - it's a Macbook Air 2017, and I found on the MacWorld website that that is almost the latest version available, and I can't find the very latest one for it. I don't believe I can put Monterey on it. If you know otherwise please let me know. Certainly on the software updates page the only update listed as available is for Paint!
The version of MC is 31.0.83 and the TrackInfo stuff would be whatever came with it. I haven't installed anything else.
Unfortunately there are Mac brower api changes between 10.12, 10.13 and newer that will affect trackinfos.
They shouldn't crash but may not work as intended.
Your device will support up to Monterey natively but I think your best bet would be to go to Big Sur (11.x).
Big Sur works well on that hardware and you don't really get anything out of going to Monterey which seems slower and more buggy.
Sierra is now out of support for most packages. You aren't going to be able to get root certs and modern browser builds on it.
If you go to System preferences->Software update you should see an option to upgrade.
If the only available version there is Monterey I wouldn't do that one. There are other ways of getting Big Sur.
Two caveats, if you update past 10.13 (High Sierra) you won't be able to run any 32 bit apps any more so if you have ones you've paid for you need to take that into consideration (older versions of photoshop and others).
The second is that you need at least 36GB of free space on your drive to update.