Toolbox error: "SolidWorks must be running" When it is.

Newly created Toolbox 2019 was set up during installation. 

Problem occurs when you export data of a fitting to excel. 

Open the excel file and add property columns and import back into toolbox. 

All the values have propagated on screen in the toolbox browser opened from within a running SolidWorks session.  When selecting "Create Configurations" (as that is the user setting selected in User Settings" within toolbox) the following error occurs. Sequence as follows:

> Create Configurations

message appears telling me how many configurations it is about to create.

< select OK >

immediately an error message appears

Error, SOLIDWORKS must be running

** SolidWorks is running **

I have had this bug on previous releases as well and think it must a be registry related issue.

Can anyone assist with the fix?  Because I get the feeling not many people are using toolbox in this way

SolidworksToolbox