...
In case a downgrade to a previous version:
Version 11.5 is forward and backward compatible to older and newer versions.
It is not advised to use the setup of the older clients because of the older Java version. Please only replace the PowerFolder.jar in the program directory.
If downgrading a client it is necessary to rename the configuration files back to PowerFolder.* else the client will start without any configuration and recreates a new one.
Task
https://powerfolder.atlassian.net/browse/PFC-3216 Show PowerFolder in Windows-Explorer tree