Hi,

We are able to reproduce the issue in house with openSUSE:Tumbleweed OS (Downloaded openSUSE-Tumbleweed-DVD-x86_64-Current.iso from https://download.opensuse.org/tumbleweed/iso/).
However, with below workaround, I could successfully launch Designer.

1. Under the designer_install folder, unzip designer-designer-linux.gtk.x86_64.zip
2. Install Java (which will set the Java path)
3. Launch ./Designer from designer_install/designer

This should launch Designer successfully.