Still no histogram in macOS

[toyotadesigner]

macOS Catalina Version 10.15.7 (19H1419)
XnView MP MacOSX
Version 0.99.1 64bits (Sep 23 2021)
Libformat version 7.95

Still no Histogram despite activation:

Screenshot 2021-10-24 at 08.33.46.png (48.28 KiB) Viewed 521 times

Screenshot 2021-10-24 at 08.34.58.png (161.39 KiB) Viewed 521 times

[xnview]

i can't reproduce, you have this problem on all file format?

[toyotadesigner]

Yes, with all file formats: TIFF, JPEG, PNG (I don't use any other formats).

I've tried all settings, but couldn't solve the problem. Even in full screen mode, which gives more space to the column, the histogram does not display.

I will try to re-install XnView later today without deleting my thumbnail database.

Which hidden config file do I have to delete to configure XnView again? I would like to keep my thumbnail database intact, because it needs almost a day to rebuild all thumbnails.

[xnview]

Ok, i've not seen that 'Preview' is closed
If 'Preview' is closed, the image is not loaded so no histogram