WMS 3.1 HotFix 1 upgrade has broken Tomcat Service

I have just installed the new hotfix for WMS 3.1 and I am now getting an Error 1607:The process terminated unexpectedley when starting the Dell WMS: Tomcat Service.

Not sure why and unable to rollback which means that I can now not access the WMS Portal at all.

So beware when upgrading!  I should have created a snapshot before trying but stupidly did not!