After reading through your PDF file again I now understand the problem.
Xubunbu ships with a custom mimeapps.list file [1] which has various types associated with LibreOffice programs, so installing LibreOffice6.1 will not override those. The solution for this is easy: remove the preinstalled LibreOffice.
Furthermore, entries containing "macroEnabled" probably need to be changed to lowercase-only [2].
After reading through your PDF file again I now understand the problem.
Xubunbu ships with a custom mimeapps.list file [1] which has various types associated with LibreOffice programs, so installing LibreOffice6.1 will not override those. The solution for this is easy: remove the preinstalled LibreOffice.
Furthermore, entries containing "macroEnabled" probably need to be changed to lowercase-only [2].
[1] https:/ /git.launchpad. net/xubuntu- default- settings/ tree/usr/ share/xubuntu/ applications/ defaults. list /bugs.freedeskt op.org/ show_bug. cgi?id= 88004
[2] https:/