PicView win-x64 self-contained.zip and PicView win-x64 Framework-Dependent.zip are portable versions that doesn't require installation, just extract and run it.
PicView win-x64 Framework-Dependent.zip, is a nice and clean single .exe, but requires requires .NET Core 3.1 installed to run it.
Download PicView.msi if you want to install it.
Change-log
User can now save shader effects to images
Fixed a bug where image info window would crash
Fullscreen image gallery will now properly center image in window
Added an option to choose whether or not to display buttons when the user interface is hidden
Update for drag and drop to preview exotic image formats as a thumb
Improved preloader