Furniture Library Editor - Linux Mint 19.3 not displaying content

[otadmin]

I am using
Sweet Home 3D Version 6.1.2, Java version 11.0.6. 64 bit -0.1/0.9 GB Java 2D version 1.5.2
Linux Mint 19.3 tricia
Installed SH3D and Furniture Library Editor from Repositories and from download.
In all cases the Editor starts but shows no content of an opened library. The frame is simply empty. The editor works, I can import libraries but again, it does not show any content of that library.

Nice, clever program to work with. This is why I bother asking this question.

[otadmin]

5 Minutes after posting I found at least one solution.
If I enter sudo java -jar FurnitureLibraryEditor-1.24.jar in the terminal the editor starts and displays the content. Seems running it as SUDO makes the difference.
Is there an easier solution?

[otadmin]

Was too enthusiastic! Editor opens and shows content, lets me open Libraries and save them but if I try to import or modify furniture the editor crashes without error message reliably every attempt.