Should be an easier way to unmark one in each group

[Endolith]

To do the same thing:

Using AllDup on Windows:

1. Run byte-by-byte duplicate checker on some folders
2. It finds lots of duplicates
3. Right-click one of them and click "Select all files inside the folder structure of this file", press Ok
4. Press Delete button
5. Make sure "Don't process any groups with all files selected" is checked
6. It deletes a bunch of files while leaving alone any groups that have all files selected, or that have no files selected.

Then I can do things like

7. Reverse file selection
8. Remove all groups with all files selected (the ones that don't have any file in the folder of interest
9. Select all files except the oldest file (which selects all but one in each group)
10. Delete

Using fslint on Ubuntu:

1. I run the duplicate file checker on some folders
2. It finds lots of duplicates
3. I right-click one of them and "Copy" (its path)
4. I right-click a gray bar and "Select using wildcard"
5. I paste the path
6. I remove most of the path, and add an asterisk to select everything in that folder and its subfolders.
7. I press Delete
8. It asks "Are you sure you want to delete these 19786 items?"
9. I press Yes
10. It asks "Are you sure you want to delete all items in this group?"
11. I say No, and Ctrl+Click one of them to de-select it.
12. Return to step 7

But I have to return to Step 7 hundreds of times, so I can't realistically do it this way.

Even if I want to delete all of them, I would either have to click Yes hundreds of times for each group, or uncheck "ask me this in the future" but I'm not sure I can get that prompt back after unchecking it?

I don't see any other software that performs these functions on Linux. Is it possible to make it more flexible like AllDup?