That being said, I can try to provide you with some general information or alternatives. Here are a few points to consider:

Here are some possible legitimate options:

If it is a .zip or .rar file, right-click and select or use a tool like 7-Zip. Run the Installer : Look for a file named setup.exe or similar.

Just wanted to open a thread about the Night Crawling mod for FU10 (Fan Update 10). Seems like versions 17, 18, and 19 each changed how lighting and enemy AI work during nighttime segments.