About these software items and donations...
Offered free, with no support implied or available. Did I say free? You get what you pay for.
Most 3ds Max scripts are basic enough they should work with any version after Max 9 (and that's a long time ago). AfterEffects scripts and/or plug-ins, when available, are CC-2020 and after.
If you feel compelled to donate something, which would be appreciated, may I suggest
Doctors without Borders Medical aid without boundaries.
The Heifer Project Providing livestock for beyond-subsistence farming.
Hero Rats No, really. Awesome work.
For installation instructions, please see the appropriate pages of your software docs. If you bemoan the lack of good instructional manuals these days, here are some alternatives:
For 3ds Max script installation, notes at Script Spot
For AfterEffects... nothing yet.
For Fusion and sometimes Resolve, the forums at Steak Underwater