how to remove external links from excel

Hello, 

I followed up with https://techcommunity.microsoft.com/t5/Excel/Remove-link/m-p/92442 and https://www.extendoffice.com/documents/excel/953-excel-list-all-links.html 

 - installed Kutools, however I can not remove external links with that tool. I cnan ot find any links with search option " [ ". 

Extarnal links still are there and when I open workbook, it every time asks me to update those links, which is very annoying and does not look proffessionals to clients...