SQL 2019 SMO cant get ClearTraceXE to work

Played a bunch in the config file.
Tried many variations of newVersion


This one seems the most correct newVersion="" as it doesn't give an error saying couldn't find assembly but the following.

Exception Type: System.NullReferenceException
Exception Message: Object reference not set to an instance of an object.
at ClearData.ClearTrace.SqlTrace.GetFileList(String path)
at ClearData.ClearTrace.SqlTrace.ProcessFiles(BackgroundWorker worker, DoWorkEventArgs eventArgs)

I know this is in beta but it did say run against SQL 2019 but maybe that just means it can read the .Xel file created by that version but not run on that versions SMO?

Either way didnt see anything in this newgroup that has helpful so posting this I'm a new user to this product but have been using ClearTrace for years.