The component download of AWI contains the following files in the zip file Automation.Engine_Automic.Web.Interface_21_0_x+build.y.zip
aa-webui-launcher.jar
awi.war
config Folder
lib folder
plugins folder
It is not enough to update the aa-webui-launcher.jar. The launcher jar starts everything from the existing plugins folder and will show the old version even after the upgrade.
21.0.x