Autodesk Autocad Lt 2019.1 Update Only [ Recommended - SUMMARY ]
Sometimes updates can change how user preferences work. If you find you can no longer double-click to edit text:
Update 2019.1 available for AutoCAD and AutoCAD LT - Autodesk Autodesk AutoCAD LT 2019.1 Update Only
If you need to filter your selection so that you are only interacting with text (and not lines or circles), use the tool: Sometimes updates can change how user preferences work