I get to the dos menu where I have to choose
Isle and Moon work perfectly. Desert crashes.
OK I found a way.
=> Launch Desert directly through DOSBOX without using the "global" launcher.
So to do this if you are not familiar with DOXBOS (which is installed at the same time as the est)
Take the Moon folder and put it on the root folder, let's say on D:/
Type : "Mount c d:/desert"
It solved it for me.