Birthe/kebi
Thanks for pointing that out. Streams will need further consideration, you may not be able to use a general tool.
Certainly you can reconfigure streams to use alternate naming standards, the default creates unique tiddlers and the are listed in the root tiddler.
The root tiddler can be renamed without harm but the subtiddlers will remain as at when they were created.
Arguably there is no need to rename them.
However if you wish to you will need to rename the tiddlers, if you do so manually you can rely on the re-link macro to update the list field on the root tiddler.
Perhaps the field stream-list can be added to the relink macros fields?
I have not tested to see if relink works in batch utilities.
I will keep looking.
Tones