This is an exe version of flash player, also called standalone flash player, it was tested and running on Windows 10 and other operating systems.
Use it to open .swf files, animations, play flash games that are in .swf format, etc.
The player should be the latest one that can be found around. Since Flash Player is now discontinued.
This file is from a trusted source and was tested, but as with any .exe file, scan it and test it before running.
Here is the VirusTotal report for the flash player exe file.
Open flash player exe, go to "file > open" and browse to your .swf file. The swf will play in the window.