The winners for summer MOTS are D-ead7Dog, toonanimals317, and Telluric! Congratulations!
Are you having trouble opening your map in Map Maker, or actually in-game?If it's in-game, I suggest taking some of the objects out of it to reduce lag. You may also want to turn off water reflction and turn down View Distance by going to Options>>Video, and altering these settings.
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.