The developer is in communication with you via email. I wanted to post the information here in case anyone else is having issues.
there was an issue with the compression zip file
The patch yo Power has been made and that should no longer be an issue. The other issue was you needed to update SLP to the current version 4.8. or higher.
your other issue was not being able to delete your Legacy Tagalong Directory. tagalong needs to be deleted since Power replaces that functionality. That is most likely an issue with your directory permissions.
He will continue to work with you through our support channels.