unclear about some usage issues

[dnanian]

Well, actually, while that's technically true, it's not quite what I'm trying to get at.

The basic deal is that if there are files on the target that you want to keep, and you're not "selecting" them for copy from the source, they're going to get deleted.

So, if you've created a given clone -- full or not -- with a given script, you should typically use the same script to Smart Update it.

In both cases, the effective result is as if you had chosen "Erase, then copy", which is why I kept trying to emphasize that: nothing on the target, other than those files that would normally get copied from the source, will be present on the target when you're done.

I'll try to rework this part of the manual for the next version. Sorry for the confusion...