You can try enable/disable borderless and fullscreen, or changing the resolution in <windows drive>:\Users\<your user>\AppData\Roaming\WizardsOfTheCode\Soulash\data\user_settings.json
The properties are
viewport": {
"borderless": false,
"fullscreen": false,
"resolution": {
"h": 1080,
"w": 1920
},
What motherboard and graphics card do you have? Can you provide driver versions for graphics and sound?