Try to uninstall DevTest 10.6 by running the uninstall.exe on a Windows server and getting the below error:
Release : 10.6
Component : Service Virtualization
Corrupted file DevTest_Home\.install4j\files.log caused the issue.
Uninstall DevTest Server:
https://techdocs.broadcom.com/us/en/ca-enterprise-software/devops/devtest-solutions/10-5/installing/installing-and-configuring-devtest-server/uninstall-devtest-server.html