I'm sure many like the new icon but I just can not get used to it. It looks like a jellybean wearing a priests collar. I don't know.
All I'm asking for is if the old icon can be included in the .exe so I can change it back to DO11's.
If that is a big 'no' on the request, could I get DO11's .ico or transparent .png?
What would you do with the .ico or .png? You can't modify the .exe, if that's what you're planning.
I would point my pinned taskbar icon to the .ico. If I got the .png, I would convert it to .ico myself.
I'm assuming you know this but icons don't have to come from the exe, just makes it easier so I don't have to keep track of where the .ico is if I format. This is why I asked if it could be included in the .exe. If I made my own .ico from a .png, I would place it in the DO data folder so it gets backed up.
Sure, we'll add it into the .exe in the next beta.
Hahaha! Anyway thanks leo for adding it back in. I'm also one of the people that just finds the new one weird. Instead of a "jelly bean wearing a priest collar", I thought we went from something that sort of resembling a sun to a gumball machine that's lying at a 45 degrees angle 
It's a bit funny but I sort of feel the same way now with the new Help and Start window. The old one looks alive and it really does fit with the icon since the whole scene is like the sun in the sky. The new one in 12.0.5 is simply the sun on a white background. It's a bit bland to be honest. I just had a funny feeling that I may not like it as much so I screenshotted the old Start and About window lol.
The new icon is not really something new that you're seeing for the first time. It has been in the top-left corner of every Opus window since forever. We're just using that style for the taskbar and alt-tab as well now.
The change is because when you switch Windows into higher and higher DPIs, the larger versions of the icon start being selected for more and more places where the 16x16 icon used to be used, often scaled down by the OS. (Windows does some odd things, too, like scaling down a 64x64 icon to 48x48 for the taskbar when there is literally a hand-made 48x48 version of the icon available to it, which is completely ignores.)
The spikes do not work well when the icon is very small, and turn into a complete mess when a fairly small bitmap icon is scaled even smaller (e.g. 64x64 to 48x48), so we felt it was time for them to go. But it is a bit of a compromise, as the spikes are nice in some situations.
It also seemed sensible to unify the look of the window icon so you aren't seeing a different thing in the top-left of windows, in alt-tab, and on the taskbar.
The About/Splash window change is a stylistic one. We're going for minimalism. Some people like it, some don't. It's just the About/Splash screens so you shouldn't be spending long enough looking at them to care that much. 
Okay. now all I see is a gumball machine
Thanks for explaining the change, Leo. It makes sense.
I don't use scaling at the moment and don't believe I will for the many years and I don't use Alt-Tab or look at icons in the top-left corner to identify a program. I even turned off that little icon on my file display border. No rays on those small 16x16 icons makes sense. I just really miss the sun rays on the taskbar icon, that's how I identify the program.
Thank you for adding it back in.