You still have a Classic license, on Windows, it should work for another 20 years. You have access to all your work through that, or via the Web-based version. That said…
I work for the distributor, aka ‘the channel’. We often get requests like this. A ‘Lifetime Award License’ would be nice.
How cool would it be to start SketchUp in front of some students, fire up SketchUp and have something like this in the Welcome Screen:
There is a ‘Non-profit’ program…