TT Toolbox WriteXL - issue

Hi, I am having an issues with a new updated TT Toolbox WrhitXL where each time i change a parameter of the data that is being written with WriteXL tool - function triggers Excel to open a new 'read only" file. This results in multiple windows being opened each time parameter of the output data has changed. Has anyone every run in to this issue?

I would appreciate any advise.

Regards,