Can my newer version of the Seagull License Server work with my older version of BarTender?
No. In BarTender 2019, the Seagull License Server was replaced with a new Licensing Service that is not compatible with older versions of BarTender.
BarTender 2016 and earlier
Yes. In BarTender 2016 and earlier, the Seagull License Sever is backwards compatible. However, the opposite is not true (newer versions of BarTender will not connect to older versions of the Seagull License Server)