[DoctorOhh]

Originally Posted by MartyTX

SOLVED: Put the desired icon in the calibre configuration directory.

On my PC:
C:\Users\Owner\AppData\Roaming\calibre\Resources\I mages\languages.png

I'm glad you got it to work for you and thanks for sharing your discovery. However, this hasn't been a problem for a long time. The directions on where to put replacement icons have been in the manual

You should not change the files in this resources folder, as your changes will get overwritten the next time you update calibre. Instead, go to Preferences->Advanced->Miscellaneous and click Open calibre configuration directory. In this configuration directory, create a sub-folder called resources and place the files you want to override in it. Place the files in the appropriate sub folders, for example place images in resources/images, etc. calibre will automatically use your custom file in preference to the built-in one the next time it is started.

since the feature was added.

Release: 0.7.10 [23 Jul, 2010]

New Features

• Allow user customization of static resources such as icons and templates "You can now change the icons used in the User Interface and other static resources. Details on how to do this are at: http://manual.calibre-ebook.com/cust...lates-etcetera "

Some folks even created some icon sets for calibre.