Currently I'm working to slowly switch all my extensions over to use chrome.storage. That will enable the settings of the extensions to sync across logged in Chrome instances.
There will be a lot of code changes (async methods and callbacks, urgh) so the result might not be that stable. Hopefully that will be kept at minimum as I try to be as careful as possible and do some test before uploading the build.
First on the list is SimpleExtManager.
Hope to release within the few days.
Do backup your groups now.
EDIT: Woah, the async is too strong in this task. Too tough, might take much more time. Worse come worst, might abort this switch.