MultiTerm not modifiable in TradosStudio 2015 SR2 (12.2.5099.5) - script error upon clicking on fields.

As the title says, a script error in traverse.js (Line 19, Char 3: "Attribute 'match' cannot be called from undef or Null reference", Code 0) is thrown any time I try to add/modify/delete any terms from within Studio, i.e. when I click on anything in the term window besides the upper save/discard buttons. This behaviour began after I installed the latest SR2, I think. The native MultiTerm program works just fine, so it's probably an interface thing between Studio and MultiTerm.

Is there a way that's not "reinstall Studio/MultiTerm"? A correction to the JavaScript, maybe? Many thanks for any pointers!