AOMEI OneKey on DualBoot PC

I would like to know, how does AOMEI OneKey recovery work if there's two or more Windows OS's installed? 

On three of my computers, there are three Windows OS's installed, in addition to Linux MInt, though my question is about Windows. 

How would I access the right OS to recover in this fashion? 

BTW, I'm a fan of AOMEI's products & have used these since 2012, beginning with a preview of your premium partition software, which I still have on one install. Plus AOMEI Backup Pro 2.0.3 has saved my day more than once, so I have confidence in the brand. 

Just curious as to how this app would work in a multi Windows setup. 

Regards,

Cat