Hi, wilderness. Thanks for reaching out! I'm an Independent Advisor and a Microsoft user like you, and I am here to work with you on this issue.
I understand how difficult it is, when the device or app won't work in the way it should.
You can try to force uninstall it and then install it again using PowerShell:
- Press WIN + X (or right click the Start menu) and select Windows PowerShell (Amin)
- Type the following command to remove the Paint 3D app from Windows 10 and press Enter:
Get-AppxPackage Microsoft.MSPaint | Remove-AppxPackage
- Type the following command to reinstall Paint 3Dapp on Windows 10 and press Enter:
Get-AppxPackage -allusers Microsoft.MSPaint | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
I hope this helps! Please let me know if that works for you, ok?