I posted a question July 16 and still haven't gotten a response. I am writing about what I think is a bug. I haven't found any info about it here.

I am trying to save a grayscale EXR image. I created the image in Krita using the 4096 x 4096 32 bit grayscale profile I chose when I started. When I'm working on it, it has a gray channel and an alpha channel. When I save it as EXR and reload it, it has RGBA channels and appears green in color because the green channel is white, and the blue channel is black. The red channel contains my grayscale image. Is there a solution to this? Am I doing something wrong? When I save in other formats it's fine.

I'm a newbie at Krita. Is there a way to delete channels like I can in Photoshop? Or draw just in one channel? Can't I edit the alpha channel?

Thanks.

When I try this, the 4.4.5 appimage and the July 30th 5.0.0-prealpha appimage won't even open the Exported .exr file.

I suggest that you first go to https://krita-artists.org/ (sign up and sign in needed) and create a New Topic with a General Questions category explaining the problem.
That forum seems to have a lot more activity for krita.
After that, a formal bug report may be needed at https://bugs.kde.org/ but get opinion on that forum first.
People there will also be able to answer your questions about channels and editing channels.
I think you have to use Image -> Separate Image.

I think you can just report it straight to bugs.kde.org, no need to go to krita-artists.org, it does sound like a legitimate bug and needs to be reported.

(Note that on bugs.kde.org you might not get an immediate answer either, but your report *will* be remembered (unlike here on the forum ) - it's like a long TODO list for Krita developers, and the bugs are being both reported and fixed all the time, even if they are not fixed immediately after the report (sometimes there is more time needed until someone works in that area of Krita and checks the bug reports to see what needs to be done)).

Thanks.

With new software, I never know if it's a bug, or I'm just doing something wrong because I don't know how the software works.
I'll make a bug report.

Thanks again.