Double install of Libre Office normal and flatpack

[tomreedtoon]

This is my latest install of Libre Office, using the Flatpack version:
Version: 7.6.0.3 (X86_64) / LibreOffice Community
Build ID: 69edd8b8ebc41d00b4de3915dc82f8f0fc3b6265
CPU threads: 4; OS: Linux 5.15; UI render: default; VCL: gtk3
Locale: en-US (en_US.UTF-8); UI: en-US
Flatpak
Calc: threaded

The problem is that I have two installations of Libre Office, which was the one I loaded from my Linux Mint Software Manager. That build is Libre office 7.5, and it will not open - a fatal error, that it cannot determine what the user language is. This is the screen from my Linux Mint office menu:

How do I uninstall the old without having to uninstall the new? Or do I need to uninstall both and reinstall the Flatpack version? Advice, please!

[Villeroy]

flatpak list lists the names of installed flatpaks
'flatpak uninstall org.blah.blah.libreoffice` uninstalls the package.

[TheSmallest]

@tomreedtoon

How do I uninstall the old without having to uninstall the new?

Use sudo apt-get remove --purge libreoffice* inside of your terminal to remove the package from the software manager (flatpak version won’t get removed).

@tomreedtoon

Or do I need to uninstall both and reinstall the Flatpack version?

No. Flatpak is installed in other directories. If flatpak doesn’t work too, then you should remove flatpak also.