Acronis True Image Eco Workstation - Issue restoring

When I try to restore an image made with Acronis True Image Eco Workstation and get to the choice what partition from the image to restore, I have three choices.

1/ Reserved by the system (this is checked as default)
2/ Boot D:
3/ MBR and Track 0

I can only choose one of them, why ?

If I go for eather one of them, I get an error when trying to boot later.
As far as I remember I checked all three otions in earlier backups....
Why can I not do it now ?

For example , if I choose option 2 , I get this error:
"BOOTmgr is missing"