Check the group/forum for the project at Google Groups / powercontrols
Or directly email to the group email@example.com
Please go through the Help and FAQ section in the app (fully searchable) twice before reporting a bug, most likely it is already answered there.
It is difficult for me to reply to each email individually, some of the emails may get lost in the huge list of unread mails. If you do not get a reply within a week, ping me again.