I was forced by some weird behaviour to reset both Windows 10 and Turbocad 2018 ProPlat.  Now every time I start TC I get a screen inviting me to upgrade to 2019.  Even if I click the Do Not Show Again, it is there the next time I start.

It is irritating, is there any way to get rid of it?

Open TC 2018 as Admin, then you click on dont show again and it should work next time you open TC.
Or find the TCWelcomesplashtest.exe and delete it, problem solved until you update TC if there ever come a New update on 2018

C:\Program Files\IMSIDesign\TCW2019\Program64\TcTools

Torfinn

Thanks Torfinn - the first solution did not work but deleting the file TCWelcome did.