I've just found out that you can prevent VMEX by simply copy and pasteing the shape in the attached file into your map. Basically, VMEX can't decompile it and it simply give up and doesn't work. If you want to try, compile a map then try and decompile it. It works for me so it should work for you. You cannot rotate it or else it will not work! Thanks to halflifestorm.com where I found this.