Hey!
We are aware of those issues after the latest update and are looking into it.
Edit: Although: If you are affected by the black screen, then please send a bug report with logs. So far I don’t know yet, what is causing this.
Thanks a bunch, this helped! A fix for this is in the works!
Very sorry for the inconvenience.
It was a problem with special characters in overview settings. 
Singularity has been updated now and these problems (especially the black screen and buying things from the market) should be fixed now. If you find further problems, then please let us know (best would be if you write also a bug report).
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