Nullsoft Installation System is a pretty small, efficient, capable installation system for win32

Whats new

Made GetFileTime handle locked files better (thanks Dave Bau).
Cleaned up exec.c some by making file_exists() return metadata about the file.
Removed any versioning issues with the multiple 1.90s (since I'm stupid and make multiple versions with the same number).

Download Nullsoft Installation System v1.91