You can use VSE cleaner (Attached)
For VSE 8.8
vsecleaner.exe /rvse88 (From command line)
For VSE 8.7
vsecleaner.exe /rvse87 (From command line)
VSECleaner.zip 46.0 K
Thank you very much. This removed the corrupted copy straight away and allowed the agent to install a new copy of VSE.