For RU you cannot change Database via change data sources in My.Spaceman.

You can only change the data base in Spaceman

In order to do that,

Login to My.Spceman by selecting SPACEMAN_RU DB as default.

Click on Spaceman.

Click on Select Data source (The Small Globe icon) to choose the DB you want to access.

After that you can click on the drop down to choose switch between the Data bases