You should forward this inquiry to the developers because in case of a bug to fix it to avoid these situations. I have the Mac Informer client installed on my OSX 10.12 as well and it's running normally without errors. I've checked the Activity Monitor as well and didn't find it to consume processing power, only when I search or download or it's doing its thing.
Access the following link to reach the support page where you can create a ticket with this issue.