The new version 10.3 was just released - now you should not loose your custom dials ever again. And there is now feature to open dials in new: Tab / Window / Private window.
I hope this helps! If you find any issues, please contact me to my support e-mail.
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That's terrible, it hurts me just to read that. I will totally fix the issue with loosing custom thumbnail in the next release! If you find more issues like this, please contact me on my support e-mail.
There will be also "restore previous thumbnail" feature soon that will also help in cases like this.
The other one with specific setting to open in new tab / window can be also done, I will try to fit it also in the next release (it will be in the Settings tab).
Thank you for pointing this out. I will release 10.3 probably during the weekend.