korell: Yes, the 3.24 patch is present. You can see the readme file in the screenshot I posted. To run the main Q2 game I just use kmquake2.exe. I only have shortcuts for the two expansion packs.
IronArcturus: Is there shortcut command to run KMQuake2 in a window? I just want to make sure it's not going to crash the whole OS again.
Inside the baseq2 folder there is a kmq2config.cfg file where you can specify the settings.
In that file (edit it with a text editor) you can find the video settings as follows:
set vid_fullscreen "1" //set this to 0 for windowed
set r_mode "25" //this sets the resolution mode.
Now I don't know what the mode values are and I don't know if KMQuake2 uses the r_mode setting because I set that to 1680x1050 in the menu settings and I don't know if this is the correct r_mode value for that resolution. I don't think any widescreen resolutions were native in the original game, but KMQuake2 enables it and fixes the FOV, which usually is done by using an r_mode of -1 and setting custom width and height values, but the custom values in my config file are for 1600x1024, so aren't being used either.
So, you could try just setting the vid_fullscreen to 0.