[HenryBemis]

If I may suggest Steve Gibson's method, Spinrite. One-time purchase. I bought it once. It 'lives' on a usb-stick, offline.

If I lose it I can download it again.

I bought it at v4.x or v5.x (I don't remember, it's been years).

I've paid for the upgrade to 6.0. The upgrade from 6.0 to 6.1 was free (and very significant).

When he moves it to v7, I will happily pay for that upgrade as well.

I don't know if I am a cheap bastard (perhaps I am) but I prefer to pay-it forward. I buy a 'lifetime' subscription for the things I want _a lot_ and/or need. I remember a decade ago I paid $200 for a SaaS when the monthly rate was $20. I use it a few times per year (so let's say it would cost me $40 to reactive-use-deactivate). I got the lifetime at 10x, I broken even after 4-5 years. I paid the folks 10x when they needed the funding (and offered the 'lifetime'), and they 'thank' me by having me on 'for free'.

That said, I did take the risk, because if that SaaS was dishonest or simply they would have gone bust, I'd lose the 90% of that payment, but the amount was small ($200 for a lifetime service is a small amount for an EU costs/standard of living).