very good plugin. For a new plugin it also has a very good quality. But I've got some questions left.
Although I've enabled the option "... to bypass rewrite from this plugin and use default WordPress rewrite instead", I can not see all entries which are stored in option 'rewrite_rules'.
I add a rewrite rule using another plugin and after flushing it works properly. But your plugin does not show the new rewrite rule.
The option to backup the rewrite rules is very comfortable. But currently I'm not sure if this backup also restores the WordPress rewrite rules, too (content of option 'rewrite_rules'). Or does it only restore the rewrite rules this plugin is using (content of option 'rewrite_rules_save')?
At last a feature I would like to see in this plugin. Is it possible to add a third column which displays the 'class' of the rewrite rule as in plugin 'Rewrite Rules Inspector'?