did I got it right:
when the font-directory within the portableapps-folder contains font-files, the system-fonts are not used anymore?
I have seen this after stripping the LO-font-zip to that folder an odg- drawing showed differnt, but after copying the
missing font-file from system-folder to that folder, everything worked. so the question: feature or bug?
System fonts are always available. The folder within LibreOffice Portable or PortableApps.com to dynamically add adds to them using a Windows API.
Sometimes, the impossible can become possible, if you're awesome!
oops, you are right, font-installation failed to be permanent systemwide, re-installed now, and everything is running fine.