"Launch Game" prompt does not do anything

[TheGameMecha]

Attempting to Launch the game from the Soulstruct editor does not do anything. This has only been tested with the Dark Souls: Prepare to Die Edition. Issue was only reproduced on one machine.

Repro Rate: 100% (for me)

Repro Steps:

1. Launch the Soulstruct Editor
2. Select Dark Souls PTDE and access a project directory
3. In the editor, go to the "Runtime" tab
4. Press the "Launch Game" button
5. Observe

Results: Nothing happens
Expected: Dark Souls: Prepare to Die Edition launches

Note: Launching the game from Steam launches it immediately, but the "Hook Game" button does not become enabled this way.