I tried changing the dictionary in Readlang, but found I preferred the default Readlang behavior. The question then became: how to change back to the default. I searched the internet and this forum and found nothing – but I did discover how to do this. So, in case anyone else wants to know, just do the following:
The default Russian dictionary URL at the moment is https://en.openrussian.org/?search={{query}}, so when you click “Reset to default” this is the one that should appear there.
And I’m so glad OpenRussian.org is up and running again. It was down quite a while since Sunday. A day or two before that it was down for awhile as well.
Once again today, OpenRussian is down. It has long been my favorite Russian dictionary. However, they never respond to their email about anything - least of all downtime.