running mathpix via snap

Hi I am running Ubuntu 16.04 and trinity. There is an interesting app, called mathpix (which transforms png into latex) https://snapcraft.io/mathpix-snipping-tool It has to be installed via sudo snap install mathpix-snipping-tool I did this and when I start with ubuntu vanilla desktop I am able to start the app. However in trinity I find the start icon, in lost+found: I start the app ps aux | grep mathpix Tells me oub 17567 0.1 1.7 3424960 143548 ? Sl 18:46 0:03 mathpix-snipping-tool But nothing happens, no icon, no app is seen. What shall I do? Thanks Uwe Brauer