I'm sure Duncan will be along to help, but it looks like the application settings in the application folder have got corrupted.

For sake of a relatively easy workaround to try, rename the interrogator application folder and reinstall/reload it.

Meridian owner since 1992
Prime & PSU, Focal Elear headphones, Roon (ROCK 8Gi5 NUC), Explorer 1 & 2, F80. 200/203, various Sonos (via Roon).