Long time reader, first time poster on a Flash topic in years
I’m not in front of a computer right now, but:
How old are the files?
Adobe might still distribute Flash CS6 if you’re a CC subscriber. If your OS is too new, a VM of some older OS should work.
Ah; here, if you have one of your old license keys around they’ll probably still work: https://www.adobe.com/support/flash/downloads.html#flashCS6
The files are from 2001
I’ll download the older Flash CS edition. Didn’t think about going that far back, but that should work hopefully.
Yeah, I remember there was one version of the authoring tool that was the first to drop backward compatibility with AS1/2 and those document formats. So everyone kept a copy of the version before it installed too.