[mjp]

On 2-18, I downloaded the KB4023057 update, the optional windows 10 version of 21H1 for x64 based systems. It completely uninstalled my Libra office program without my permission. Now all the libra office documents on my computer appear as Word documents instead of Libra office documents.

[minnesota_bound]

#3 Change the default program back to LibreOffice.
Right click on say a Word doc icon and in the menu choose Open with> Choose another app and choose LibreOffice.

You can also just open libreoffice and it should tell you “the following file formats are not registered to be opened by default in LibreOffice”.

Click OK to fix.
A window will pop open and you can check the box next to the file formats then click on the Save button.
Close LibreOffice and then you can double click on the LibreOffice icon that should be back.

Example when I open LibreOffice I see the message above after MS Office took over once:
.odp
.odt
.ods

[daniel1212]

"On 2-18, I downloaded the KB4023057 update, the optional windows 10 version of 21H1 for x64 based systems. It completely uninstalled my Libra office program without my permission. Now all the libra office documents on my computer appear as Word documents instead of Libra office documents."

That is not good, though just running the Libre Office installation should fix that. Is your profile %UserProfile%\AppData\Roaming\LibreOffice still there? Meanwhile kb5010342 would not install on this AMD desktop. Even after doing a Reset+ Reregister Windows Update Components.