This Tutorial is the best tutorial that you can use if u are sick of the damm crashes and you didn't saved in a long time ohw it happened me all the time BUT now i found something something that whas hidey nobody came up with this thing
a AUTO BACKUP or AUTO REMINDER a message that pops up that says you did not save level in (...) minutes do you want to save now? and then you can select yes or no
how to activate this its damm easy i can show it in one or 2 pictures

setp 1
in menu bar on top of your screen select tools>preferences...

then goto file and set the ammount of auto reminder to a value of your choise auto bacup is stupid it is not good with it and it is not that you want to wait becuas auto backuping
now press ok and now every blabla minutes a dialog comes up asking to save heey isn't that usefull heres a image for the uhm people who still dont know what they have to do