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Old 11-19-2023, 04:33 AM   #31
dhowl
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And there it is. That fixed it. I'm back in business and on 7.0.

gui.json was indeed the culprit. Not sure how it got screwed up but no matter.

It's quite a relief to have it resolved.

Thank you all for walking me through the possible fixes. I really do appreciate it.
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Old 11-25-2023, 08:00 PM   #32
robertn51
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I read the advice. The bit about deleting folders snagged my attention. Something I hadn't tried.

And then I had to pay attention to everything else in the word. My B.

Anyway: I got Calibre back!

(For ref: This is a Windows system
Edition: Windows 10 Pro
Version: 22H2
Installed on: ‎19-‎Jun-‎20
OS build: 19045.3570)

1. Uninstalled Calibre 6.29.0 using windows uninstall from the Settings -> Apps.
(6.29.0 was the last version I was using when all this happened.)

2. Confirmed all Calibre keys gone from Registry

3. Deleted all the Calibre folders in C:\Users\%MyUserName%\App Data\Local\ and in ..\Roaming\

4. Also deleted the default Calibre Library at C:\Users\%MyUserName%\ but do not do this without backup: My actual Calibre Library with all my books and preference settings is out on a NAS. (And I temporarily renamed it just to be safe)

5. Reinstalled 6.29.0

I got Calibre back!!! (Had to adjust the IU font size back to The Old Man size. Boom!)

6. Updated to 7.1.0.

All is well.

Thank you.
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Old 11-27-2023, 01:59 PM   #33
ymerejo42
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I've had a very similar problem since I installed 7.0.0, hoping this will work for me, too. I'll know later today (triggering it is weirdly specific, I have to let my computer screensaver kick in, then when it wakes Calibre comes up with a titlebar and blank screen).
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Old 11-28-2023, 02:11 AM   #34
ymerejo42
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This seems to have solved my issue, as well. Not sure what's going on.
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Old 12-10-2023, 11:07 AM   #35
ymerejo42
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Update to say that no, it didn't. At least, not long-term. Calibre seems to be having some sort of issue with its config files, it works for a little while then stops again.
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