Quickbooks Desktop Pro 2020 install on updated Windows 10. 

I've added Customers and invoices. Want to email invoices, so attempted to set up email.

Go To,   "Edit", "Preferences" and select "Send Forms" 

I Get a "qbmapi64" error box with "out of memory" message,   with only a selection of "OK".

I then get the Quickbooks - Unrecoverable  window to send a report to QB. 

Then it shuts down QB completely.

I've run QB tool hub against the program, to no avail. 

I've run Regedit and changed my 

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\SubSystems

 changed my Windows\SharedSection   value from 1024,20480,768  to  1024,[removed].

Please, if you have run into this, let me know if you have found a solution.