In my game as well, with the newest version of the update, I get Fatal Crash errors whenever I interact with "buildings" within a city that has a reasonable player population. For example, buying/applying upgrades, hooking up to a new trailer, getting close to drop-off point for the delivery, etc situations, have all caused a Fatal Crash error for me. I have yet to get one just "driving around" when there are not other players around in abundance.
I have reinstalled ETS2MP, ETS2, cleared cache, all that fun stuff. Worst case, is I have to load my game in single-player, drive the last 50-miles again to make a delivery or whatever, quit and re-log into multiplayer, and play until something else makes it crash again and I need to rinse/repeat.
I do notice that when I play with the winter mod disabled, it seems to happen a little less frequently.