Navigate to: Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome
With the Chrome folder on the left highlighted, select Edit/New/DWORD (32-Bit Value)
or, if you prefer, on the right side of the screen in a BLANK SPOT, you can RIGHT CLICK New/DWORD (32-Bit Value).
Name it ExtensionManifestV2Availability and hit enter.
Right click what you just created (ExtensionManifestV2Availability) and click Modify. Set the Hexadecimal value to 2, and click OK.
You’re done, but check your work by opening Chrome, and pasting chrome://policy in the URL Address bar and hit enter. You >
should see the ExtensionManifestV2Availability policy, and the value should be set to 2. If you don’t see it, click “Reload Policies” > and/or review your work.