Am Montag, 4. Februar 2019 schrieb phiebie@...:
> Dear Thierry,
>
> Am 03.Feb.2019 um 23:05 schrieben Sie:
> >> I wanted to install trinity, preliminary stable, alongside KDE.
> >
> > a) You say Buster. Where did you install TDE from? What version? As
> > far as I know, for Buster you need the premilinary builds.
>
> Didn't I write that? And it came from
> deb http://mirror.ppa.trinitydesktop.org/trinity-sb buster deps-r14
> main-r14
>
> > b) You say KDE 3.5.10. I seem to remember that install instructions
> > said to purge any KDE 3.5 elements befor install. So yes, KDE 3.5 and
> > TDE clash. It's known. I guess that's because thes share files with
> > the same name, but different contents.
>
> Wiki.trinity.desktop.org:
> "TDE will automatically execute a script which will migrate as many of
> your KDE3/TDE3.5.x settings as possible. At the end of the process,
> your KDE3/TDE3.5.x profile will still exist (unchanged) and a new TDE
> profile will have been created inside the ~/.trinity folder."

This is about the user's config files in $HOME/.kde, not about installed 
packages.  You can try to just use your old ~/.kde (kde3!) settings in 
~/.trinity.  The mentioned script just copies some selected files from one 
to the other.

Kind regards,
Stefan