Postman app hangs on open after changing account log-in - Linux

I am running version 7.2.3, which I believe is the latest as of this post.

My OS is Kubuntu 18.04

I opened the app, and logged in using my Google account. This worked as expected. But I needed to be logged in using another account. So I logged out. But I could not find an option to change accounts inside the app, so I logged into Postman using the web interface. After this, the app will not open properly. I get to the spinning planets animation and that is as far as I get.

How do I fix this?