Hello, tovarisch!
Not an elegant patch, but it works. Simply replaces 640x480 with your desired resolution. The engine seems to handle aspect ratio correctly.

Also don't forget to download patch 1.2 in case you didn't.

Compiled code link (remove spaces): htt ps://yadi .sk/d/rUQs8ed3uBxzQQ
Source code: https://gitlab.com/-/snippets/3639104

1. copy exe to your game folder
2. launch
3. enter your desired resolution (like X: 1920 and Y: 1080)
4. launch config.exe and choose 640x480
5. launch the game

you can do it manually, if you wish to:
640 is at 0x7BB6E
480 is at 0x7BB78

Soviet 4K glory (if you get blank screen, disable post-processing):