well, sometimes the particle files (if there are) goes duplicated but with a different number. You should use the search assistant to search for all the recently created particles, and delete all those with the most recent creation time (all with the same creation time but with more or les 2 minutes of diference)
Be careful because if you delete more than you should, it also can cause crashes.
Also i coulkd suggest to have a back-up of your meshes while the game were working, so if you have to reinstall your maps, you just need to restore your meshes and your unexported maps.