Thread: Hangs on Initializing User Interface
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Old 04-19-2019, 09:10 PM   #10
theducks
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Quote:
Originally Posted by mdhuang View Post
Sorry to bring up this old thread, but Google brought me here
Got the same problem, Calibre hangs at starting up "initializing user interface".
Solution:
1. Uninstall Calibre
2. Delete AppData\roaming\calibre (AppData is a hidden directory under your user home directory, normally C:\Users\[your_user_name].
3. Re-install Calibre

It should work now!

How did I find this out? The portable version always works on my PC, and I figured there was some old stuff which was not compatible with the newer version of Calibre. And I found that.
Nekro Post 2.20 was a clue, if the last post date was not.
there are many reasons.
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