Problems with Theming App

Hi Guys,

at Weekend i installed Nextcloud via predefined Vm from techandme. All works fine so far - but changing the Color from the Theming App seems not to work. Strange Thing is that when i change the IP adress and trusted_domains it resets to Default - so i guess it is somewhere stored per IP/trusted domain?

But i have no chance to reset it to Default - is there any info where These Settings are stored so i can delete/reset them to Default via SSH? i am runnung latest NC release 13.0. ?

thx for your help!