Once upon a time in MultiTerm it was possible for people using a UK keyboard to press Alt Gr and the letter i to produce í or capital I to produce Í, but not any more. Is there an alternative?

Once upon a time in MultiTerm it was possible for people using a UK keyboard to press Alt Gr and the letter i to produce í or capital I to produce Í,  but not any more. This combination now triggers a wizard.  That's really tough on people working in the Irish language.  Does anyone have a simple solution to this problem?