Welcome to the forums MrPalais.
It’s odd that the TrayIcon is crashing, normally it will run as an additional copy of Duplicati on a different port, 8300 vs 8200.
Check out the instructions here on migrating to a service based install. I’ve also posted to that thread (currently the last post) regarding the changes after going to a service based install. FYI: During the Duplicati installation DO NOT install it as a service, follow the above mentioned instructions to migrate the standard install to a service based install.