1. Nope, was always right after system startup and all HFS were completely idle, I checked. That's the ones I have for OS compatibility, they usually aren't accessed at all, only there for regression testing (Win95, Win98, WinNT4, Win2k).
2. When I wrote my previous reply, their readme still said 28 days. That now seems to be gone. I'd propose 24 days as this should prevent the expiry email from being sent.

But 25 days is OK, too.