I downloaded the latest update 1.4.5.1 from GOG and now I can launch Gladius again.

Here is my dxdiag.txt

There is no option to select a "preferred graphic processor" in the nVidia control panel. I only see options to set antialiasing, etc. I only have one GPU on the system (a Geforce GTX 960).

Gladius crashes on launch, and then the ErrorReporter also crashes recursively throwing up more and more dialogs until my system runs out of memory. If I delete ErrorReporter.exe I only get one crash dialog, so I can keep using my system. This is the backtrace from the Gladius.log 3221225477 EXCEPTI...

I figured out why I couldn't find the OPTIONS.TXT... I quit from the mission using Alt+F4 and that triggered a crash before it could create an options file: Unhandled Exception! ExpCode 0xC0000005 ExpFlags: 0 ExpAddress: 0x004CF2D1. If I exit to the main menu and press the Quit button Hell exits cle...

I could not find an OPTIONS.TXT file in the My Documents/My Games/HELL directory. Adding one with the line you mentioned (and USER.TXT) didn't seem to have any effect. After poking around a bit I found the Hell/Core/UI/OPTIONS.TXT file in the Hell game directory. That file has a commented out sectio...

Is it possible to activate a left/right UI mode like all the other games using this engine such as Pike & Shot, Sengoku Jidai, Battle Academy, and Sanctus Reach? I find it very hard to retrain my muscle memory for this left-only UI mode...