There’s an issue with 1.2.1

After upgrading to 1.2.1 Unibox fails to load up. The icon jumps for 2 minutes in the dock and nothing happens. Please resolve. Got used to this app but may be obliged to move to another mail client.
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Surprisingly, after several attempts Unibox finally got loaded.

skazak about Unibox, v1.2.1