If it crashes, it now tells you instead of vanishing
Two reports describe the same symptom: launch the exe, and nothing happens at all — no window, no tray icon, no error (#23, #32).
A release build has no console (windows_subsystem = "windows"). The window-creation failure path already wrote gui-error.txt and showed a message box, but a panic anywhere else printed to a stderr that does not exist, and the process simply disappeared — which is exactly what those reports describe.
Now every crash leaves evidence:
- the message and its
file:linego to%LOCALAPPDATA%\dlss5oneclick\gui-error.txt - the same text appears in a message box
If the tool has been doing nothing when you launch it, run this build and attach that file to your issue.