I use this plugin on two websites where the web host has shut down the website due to high resource pulls.
This has happened in the last 2-3 weeks since your new release. Do think there is anything in the plugin that could be causing this?
Further, when I run exploit scanner to look for hacks and malware, there are many files in the backwpup plugin that appear in the results with base64_decode. Can you verify that the plugin is clean?