Renaming folders, deleting conflict

[OldSoldier]

How to rename folders, and if target name exists, delete/overwrite/merge it?

I have many folders and subfolders such as
a
a_000
a_001: b.txt, b_000.txt

I need this:
a: b.txt
(ex a_001, b_000.txt)

I replace "_000" with "", including subfolders in Section #12: Filters, and checked "Allow Overwrite/Delete Existing Files", but here is the problem. Program can't overwrite/merge/delete folders, so i get this:
a
a_000
a_001: b.txt

[therube]

In your example, a's are directories & b's are files?

While not an answer per se, see, Merging folders and sub folders.

[OldSoldier]

In your example, a's are directories & b's are files?

While not an answer per se, see, Merging folders and sub folders.

Yep. And yes, sadly, this topic isn't the solution