Hello everyone
I was replying to a post on this forum about an user request to reduce red-eyes:
In order to help this user I have downloaded from Internet a picture with the problem (red-eyes, I mean) 
I have discovered that with this very particular PNG image the G’MIC 2.9 GUIs is not available with GIMP 2.10.18 (Windows 10 - 64 bit). It is greyed out and you can not click on it.
The 2.9 CLI version of G’MIC works fine with this same image. Therefore I don’t know whether it is a “bug” of GIMP or G’mic (Qt graphical version…).
As reported this problem occurs only with this png file. The other PNGs images work fine in that the GUIs is always available with GIMP.
In addition, if I save this same image as jpeg the G’MIC plugin is working on GIMP.
Here is the image:
