1.) Although clicking on ICO (icon resource) files works, the editor does not handle them correctly, i.e. all is white.
I will look into it. It is probably a wxWidgets problem though (but maybe I am calling the wrong image handler)
2.) XPM files with multiple resources are handled as if they had just one image. After saving the other images are all lost.
I did not know that XPM can have multiple images into it. It can be a bit tricky to handle (Open multiple editors ? Ask the user which image to open ?). Besides, wxWidgets handler does not make provisions for it. But since I have already patched it (to handle XPM with C++ comments inside), I can maybe improve it.
3.) The tool section "image modification" has no icons - only buttons with long text. This is probably by design.
This is by design. The reason is: I have not found explicit icons for them. It can be improved, but it is not critical.
...besides I created / manipulated quite some resource files meanwhile. It seems to have become quite stable. Good work! :-)
Thank you for the support ! There is still a crash occuring on Linux, to fix.