Minimwatch needs Java?

[Alan Robinson]

I have recently changed laptop. My new one (as my old one did) runs Windows 10 Pro
I have downloaded Java 8.0.1510.12 and now downloaded Minimwatch 0.8.4
I did a restart between the two
When I click on the Minimwatch icon on my desktop, it opens up Downloads and asks me what I want to do with Mwatch.jar - open or save?
It was very straightforward on my old laptop