Enderal new install does not start/ launcher doesn't open

[fsmyth]

Hello.
I have downloaded the Steam application (Enderal: Forgotten Stories) and all seemed to go well.
But when I try to launch the game from steam, the small loading window appears, and then
everything goes back to the desktop. It does not load an Enderal launcher, or the game.
All other Skyrim installs work fine for me:
Vanilla Skyrim
ESO
Skyrim SE (except very slowly - probably video card)

Any ideas?
Thanks.

[Stefanie]

In order to describe your mistake more clearly we have some questions.

-How do you start Enderal-FS? (it should be the Enderal Launcher via the Steam link)
Does this open or is it already over?
In case the launcher opens and you start the game above it, there is a short loading window and a clear sound, can you hear it?
-You have installed Enderal into a new / empty folder as suggested?
Example: "C:\...\Steam\SteamApps\common\Enderal"
-What's your system? (but you could also upload your [launcher.log] here)
You'll find it by default at : "C:\...\Steam\SteamApps\common\Enderal\EnderalLauncher\system\log"
-Do you have any mods installed for Enderal-Forgotten Stories?
If so, which ones? (and disable or uninstall them)