Problem with Defraggler window disappearing.

After the last update I found that if I ran defraggler and then opened another window in my Windows 7 OS the Defraggler main screen was lost. When I tried to click on the Defraggler Icon on my Desktop a message "Defraggler is Already Running" appears. I have tried everything but I cannot get the Defraggler window to return.

This is very frustrating as I want control over the program and also view the progress of any defraging of my hard drives. I have not scheduled Defraggler nor have I set it to replace the Windows 7 OS defragger.

Running Windows 7 Home Premium 64 bit

What is the solution or is this a BUG?

I won't use it until this problem is resolved.

Do you have 'minimize to tray' ticked in settings?

https://www.piriform.com/docs/defraggler/defraggler-settings/defraggler-options-advanced-tab