Can't change Beam settings anymore

We bought a Beam last year to improve the sound on our telly. We bought an old smartphone so we could download the app as neither of us owns a smartphone. Sadly we now can’t update the app (after only a few months) so we can’t change the settings on thr Beam (e.g. turning off night mode). So my question: how can I change the settings on my Beam when I don’t have a smartphone? Surely it is not a requirement? If so, that needs to be made MUCH clearer when buying Sonos products.