I have never been able to recover from a computer crash or power outage using Photoscan on a single workstation.
So, what I did to solve that problem is use Photoscan Pro in network mode. Install Photoscan Pro on a computer that will not lose power or reboot and start Photoscan in -server mode. When you start a process that takes a lot of time, use network processing. Start Photoscan Pro on your workstation in -node mode. It will do the work in tasks that the job manager manages.
The job manager maintains state of the job. If the workstation goes offline for any reason, the job manager will wait until it comes back online and resume the job. Recent versions of Photoscan Pro allow you to save the state of jobs in the job manager so you can save job state, shutdown the job manager, then reload the state and resume network processing later.
SB