Hyper as Windows shell for file manager

Servant Salamander file manager reads path to shell from ComSpec env variable.
If you set it to Hyper, then running it from the file manager causes process to start & stop in loop.

What happens:

1. Set ComSpec user's env variable on Windows 10 to "C:\Users\<user>\AppData\Local\hyper\Hyper.exe".
2. Run Servant Salamander file manager (it reads ComSpec and use it as a command line).
3. Write something to cmd line input in Servant Salamander and press "enter".
4. Hyper starts (window appears) and immediately closes (window disappears) and again and again and again...
5. Close Servant Salamander.
6. Hyper still starts and ends repeatedly.
7. You need to restart windows to stop it!

What should happen:

Hyper starts (window appears) and passed command from Servant Salamander executes, then the window closes ant that's all.

Start by tracing Hyper's Windows command-line and shell-launch handling; the issue names no source file or test entry point. Reproduce the ComSpec and Servant Salamander steps on Windows, then verify that the passed command runs once and Hyper does not relaunch after the file manager closes.