You could just install the latest version of Flash version 32.0.0.65 again. I have the latest version for windows and mac for ActiveX, NPAPI and PPAPI web browsers on my computer, and maybe an outdated one for linux. I'll upload it to my gitlab account later this month but I can send it to you.
People are making an open source version of the flash player to keep flash alive into the future. That way all the old flash content will carry on working and still be supported after Adobe discontinued support. It can be installed on windows, mac, and linux, it can be installed into the web browser as an extension for Chrome, Firefox, Safari and Opera, and it can be embedded on any website by including a javascript file. Also it lacks the security vulnerabilities that flash had.
It's a work in progress and it's called Ruffle.