Can't install on Linux-Mint 19

Hi all

I have a new installation of Linux Mint 19 (complete replacement of LM 17), and I can't seem to get Draftsight installed. Opening the DEB in gdebi shows " Same version is already installed". I have gone through the disk and deleted everything related to the prior installation, and tried "sudo dpkg -i draftSight.deb"; it worked for a while, looked like it was installing something (it's a 650MB DEB), but afterwards would not start draftsight, and draftsight was not in the menu.

The relevant sections from the log don't seem to show anything I can identify as an error:

2019-07-27 14:40:23 upgrade draftsight:amd64 2018.3.0.4215 2018.3.0.4215
2019-07-27 14:40:23 status half-configured draftsight:amd64 2018.3.0.4215
2019-07-27 14:40:23 status unpacked draftsight:amd64 2018.3.0.4215
2019-07-27 14:40:23 status half-installed draftsight:amd64 2018.3.0.4215
2019-07-27 14:40:42 status half-installed draftsight:amd64 2018.3.0.4215
2019-07-27 14:40:42 status unpacked draftsight:amd64 2018.3.0.4215
2019-07-27 14:40:42 status unpacked draftsight:amd64 2018.3.0.4215
2019-07-27 14:40:42 configure draftsight:amd64 2018.3.0.4215 2018.3.0.4215
2019-07-27 14:40:42 status unpacked draftsight:amd64 2018.3.0.4215
2019-07-27 14:40:42 status half-configured draftsight:amd64 2018.3.0.4215
2019-07-27 14:40:47 status installed draftsight:amd64 2018.3.0.4215
Draftsight is a critical program for me: can anyone shed a light on this?