Can't open my documents in SAP Lumira

Hi ,

I downloaded SAP Lumira desktop edition version 1.28.5. initially it worked fine but once I activated the chart extensions I am no longer able to open my documents in SAP Lumira, it simply hangs whenever I try to open my documents or even if I want to create a new one. please see the screen shot below and please advice how to resolve this issue?

Thanks in advance for all your help!

Fatma