the tiddlers in the op can also be used with older versions of tw5.
wjam
The filter provided filter also includes all draft tiddlers so those will be backed up too.
When you want to save system tiddlers too you should remove the
!is[system]
part of the filter (or the filter-field of the attached tiddler after importing)
when you are developing your own system tiddlers then you are probably use a personal prefix similar to what I use:
$:/plugins/wjam/xyz
Then add a filter which contains
search:title[$:/plugins/wjam/]
in the filter.
I've seen the option to disable updating the modified field, but I do not use it. This would complicate versioning. Above additions will at least include all your stuff. :)
related topic: When you use my diffview import at twjam5beta.tiddlyspot.com the tiddlers with unchanged modified fields will be deselected by default and therefor not automatically imported when you press the [import] button.
It would be best to select those just to be sure using the provided single checkbox.
//It would also be possible to add additional checks e.g. compare text fields using wikify widget but that will slow things down considerably.//
wjam