v0.5.91 is flagged by Microsoft Defender as a virus/threat.

[Loban79]

v0.5.91 is flagged by Microsoft Defender as a virus/threat.

[res2k]

Well, given that you omitted any details, that screenshot just says something was flagged...

Anyhow, I ran the archive available on GitHub, and indeed it's flagged there, but by Windows Defender only:
https://www.virustotal.com/gui/file/151d1db7ada21b9c238c0706015786b8a1380b34dc4ea84165c417268771875c/detection

Interestingly, a re-analysis produced a different detected "threat".

Curiously enough, the archive you can download from the GH action run is not flagged by VirusTotal at all:
https://github.com/res2k/HDRTray/actions/runs/12529346736

Even though it really contains the same files:

$ sha256sum.exe HDRTray-v0.5.91/*
9c5366d3e1ee44f7669d054f3fdd9fedeb5b456f616b2c5c1a9227e1dcff357d *HDRTray-v0.5.91/HDRCmd.exe
2f497adb54fca0234faca8943e8d088006911ac546f519e19f51012553d4e76f *HDRTray-v0.5.91/HDRTray.exe
8d2dea39b83c319537ae353b335fc9c63494469073b4eb7de02b7e7ec42aaf67 *HDRTray-v0.5.91/HDRTrayConfig.exe
57171784b49af66514906ae561b20351315a2009cb1dfb4fb85f5f401b96b398 *HDRTray-v0.5.91/HDRTrayConfig.pri
425550d6cee5325f40e42723db9b3f17c59b80d640526f91121abc31b0014ed8 *HDRTray-v0.5.91/LICENSE.html
19441ea2c566670bd59daac8ecb6541c40f8e69d1d9353d88526dd80ea16ec9f *HDRTray-v0.5.91/Microsoft.WindowsAppRuntime.Bootstrap.dll
ce9be8484df4e0fffea63cebc9eccf0be3c0e01d4dc8fae0eb24604f718b3398 *HDRTray-v0.5.91/README.html

$ sha256sum.exe HDRTray/*
9c5366d3e1ee44f7669d054f3fdd9fedeb5b456f616b2c5c1a9227e1dcff357d *HDRTray/HDRCmd.exe
2f497adb54fca0234faca8943e8d088006911ac546f519e19f51012553d4e76f *HDRTray/HDRTray.exe
8d2dea39b83c319537ae353b335fc9c63494469073b4eb7de02b7e7ec42aaf67 *HDRTray/HDRTrayConfig.exe
57171784b49af66514906ae561b20351315a2009cb1dfb4fb85f5f401b96b398 *HDRTray/HDRTrayConfig.pri
425550d6cee5325f40e42723db9b3f17c59b80d640526f91121abc31b0014ed8 *HDRTray/LICENSE.html
19441ea2c566670bd59daac8ecb6541c40f8e69d1d9353d88526dd80ea16ec9f *HDRTray/Microsoft.WindowsAppRuntime.Bootstrap.dll
ce9be8484df4e0fffea63cebc9eccf0be3c0e01d4dc8fae0eb24604f718b3398 *HDRTray/README.html

...so there's a chance Defender will not complain about that.

[res2k]

Re-analysis today is clean - no flagging. (Same link.)
Maybe a Defender update addressed this. Will close issue.