PDShExt64.dll - Explorer crashes when you right-click on a file.

Only crashes Explorer for zip files in Windows 11 Pro x64 - even just selecting a zip file would cause Explorer to crash.
Examination of the Event logs revealed the crash was being caused by the powerdesk shell extension.
Used the nirsoft shell extension manager and was able to disable the extension - and fixed the problem!

The details of the shell extension that might cause the problem:

Shell Extension Name:	PowerDesk Extension
Filename:	PDShExt64.dll
Description:	PowerDesk Shell Extension
Company:	Avanquest Publishing USA, Inc.
Product Name:	PowerDesk
File Version:	6.0.3.0
CLSID:	{E682004E-DA1E-4b71-8A42-A540AD61BDC0}

If you think that you have similar problem in your system, you can try to fix the problem by disabling the specified shell extension. In order to do that, simply follow the instructions below:

1. Download and run the ShellExView utility from this Web page.
2. Find the right shell extension according the details specified above.
3. Select this shell extension and press F7 to disable this extension. After disabling the shell extension, check if the problem still occurs. If the problem still occurs, you should enable back the shell extension by pressing F8, and then try to search for another shell extension that might cause your problem.

This shell extension problem was reported by deuxbits