I’m trying to update GSX, there’s 35 updates gets to about update 10 them just disappears.
As already explained in so many other posts asking the same thing, this is completely normal, and it's not a crash, it's a clean quit.
First, in order to see all 35 steps performed, you would need to have ALL FSDT products installed, if you have less than all products installed, less steps will be performed. This was of course exactly the same with the old updater, the only difference is now we list only major steps, so the total right now can be up to 35 steps, and before we listed up to 500+ steps, because we counted even single GSX family of vehicle update as a single step, while now we count all vehicles in a single steps ( 3 in fact, if you have both FSX and P3D installed ), but the end result it's the same, just running faster and you didn't had any extra value in reading about all 500+ separate sub-steps, which incidentally made the update slower too.
And, since at the end of the process, there's just nothing left to do, we saved you from that unnecessary extra click to close the updater, and automatically close when we are done.