How will lifetime licenses be affected by the switch to being freeware? states:

What license agreement will apply to my existing, paid licenses?  Will the same agreement apply to the unrestricted, free version that will be made available?

The license agreement under which you originally obtained the paid licenses to Sandboxie will continue to apply to those paid licenses until the expiration of the applicable license term. 

But some of the licenses are lifetime. Do they have any reason to expire?