JPEGView-Static - fast and tiny viewer/editor for PC/Web Images (JPEG, BMP, PNG, WEBP, GIF, TIFF) and Camera Raw Formats (DNG, Canon, Nikon, Sony, Fuji, Sigma) in exactly one statically linked executable..
Please release versions WITHOUT any installer, as plain zip files, as the original author of JPEGView did. There is no need to use the installer for such a program and it only takes time.
Currently, Windows file associations can be set/unset inside main app only. Thus if one set that associations and then uninstalls the app, they remain invalid in Windows registry. Installer have to check the associations during uninstall and unset them if needed.
JPEGView has nice semi-transparent window that appears automatically (if checked in settings), that allows to adjust brightness, contrast, saturation, color balance of the image being loaded. But if image size on a display is not large enough, that window does not appear quietly. No warnings are displayed.