3D Builder has disappeared from my Windows 10 and the MS store doesn't have a download option to put it back

See CharlesGunzelman's answer from 14th Nov. It's the only answer in this thread which worked for me.

that link is broken and useless as most everything in this thread has been.

You're welcome, MS_NealB.

Regards,

Try the methods below one at a time, to fix the problems in the Microsoft Store. After each one, check if the problem is fixed.

1- Check your time and date settings

.. Sometimes the Windows Store won’t update if your time and date settings are incorrect. To make sure they’re right, click on the time and date in the far right corner of the taskbar. In the panel that appears, select Date and time settings, which will open the settings app.

2- Clear the Microsoft Store cache

.. Press the 'Windows + r' keys and type 'wsreset.exe' (without the quotes)

.. An command prompt window opens and then closes after approximately 10 seconds.

.. The Microsoft Store then opens automatically. Check if it works properly again.

3- Run troubleshooter

.. Open Settings again (Windows + i)

.. Go to Update & Security> Troubleshooting.

.. Select Windows Store Applications and then click the Run Troubleshooter button.

.. The utility will launch and check for problems that are preventing the Microsoft Store from functioning properly. If it detects anomalies, follow its recommendations.

.. When the problems are resolved, close the utility.

.. Go back to the Microsoft Store and check if it works properly again.

4- To reset it:

.. Open the settings by pressing the Windows + i keys

.. Go to Apps> Applications and features.

.. Select the Microsoft Store application and then click Advanced Options.

.. Click the Reset button.

.. Confirm the reset by clicking on Reset again.

.. Go back to the Microsoft Store and check if it works properly again.

5- Reinstall Microsoft Store

.. Open Windows PowerShell as administrator. To do this, right click on the start button and click on 'Windows Shell (admin)'

.. To reinstall the Microsoft Store app, enter the following command (you can copy and paste:

Get-AppxPackage -allusers Microsoft.WindowsStore | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}

.. Go back to the Microsoft Store and check if it works properly again.

6-Restore all Built in apps on your system

The process for reinstalling Windows apps is very similar to Scan File System.

• Open Windows start menu and type: Powershell

-Right-click on Windows Powershell and select “ Run as admin”.

• Copy then paste the following command always in the same page:

Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}

• Press Enter and let the process take place.