After Upgrading to Dorico 3.5, all projects play back a semitone sharp

Help! All new projects and all my previous projects are playing back a semitone sharp. This is after the upgrade to Dorico 3.5.

The program is unusable in this state.

This will almost definitely be a sample rate mismatch. Go Edit > Device Setup, toggle it from 48000 to 44100 and back again (or vice-versa; there’s not necessarily anything wrong with the setting itself).

The fault is generally caused by another program changing the sample rate after Dorico has already loaded.

That was unbelievably quick, thankyou! Worked perfectly