Termbases are open in Multiterm 2015 by default...should I change it to MT2017?

Hi!  I have Multiterm Destop 2015 SR2 and MT Desktop 2017 SR1 installed on my computer.  When I double click a Multiterm termbase, it opens in MT 2015 SR2.

Is this normal and expected?  How would I make MT Desktop 2017 the default program for termbases?

Thank you for your advice!

 

Chunyi