Teigha File Converter
Downloading the 64 bit .deb.
I double clicked on it, and it opened up the TeighaFileConverter install in Ubuntu Software Center.
Lintian check results for /home/marcin/Desktop/TeighaFileConverter_QT5_lnxX64_4.7dll.deb: E: TeighaFileConverter: bad-package-name E: TeighaFileConverter: package-not-lowercase
Ignored this and installed anyway.
Important Note: Teigha File Converter has been replaced by ODA File Converter