Error upgrading ServiceControl from 5.4.1 to 5.6.1

ISSUES UPGRADING INSTANCE:
Could not upgrade instance because of the following errors:
Error while making new version active and unsuccessful in restoring previous version.

Manually restore ‘C:\Program Files (x86)\Particular Software\Particular.ServiceControl.old’ to ‘C:\Program Files (x86)\Particular Software\Particular.ServiceControl’ to repair instance.
Please verify the details or contact support.

Map ‘Particular.ServiceControl.old’ isn’t there, only ‘Particular.ServiceControl.new’ and ‘Particular.ServiceControl’.

Services are stopped before upgrading. What is wrong?

Could you please contact non-critical support regarding this issue?