replied on March 17, 2015
This was designed to be similar as browser cookie. Hence if you clear it, all will be cleared. And instead of re-installing the app, you can opt to clear app data from system settings.
For most end user, there will normally be one or two items in the list and we didn't want to complicate the functions on that list.
Hence, it's not top priority for now, but we have it on the to do list. If we implement it, probably there'll be an Edit button to make the deletion buttons available, so that end user won't accidentally delete certain configuration.