How to remove tabsets, as they remain in list

[Bart]

How to remove preset tabsets. The remain in the list under Tools/List management.

Thank you. Bart

[highend]

Menu - Tabsets - Go to Tabset Folder
Delete the non-needed ones
Remove their entries in the List Management afterwards

[Bart]

If I do Tabset -> Open, I found some that I cannot manage to remove from the list. If I activate that tabset, nothing changes in the tabs.
How to remove the individual tabsets from the ini file? I was hoping to find a tabset manager when I can set the order and delete tabsets. But in Tools -> List Manager i only find recent tabs.

[highend]

I found some that I cannot manage to remove from the list

Show a screenshot after using Tabsets - Open

Which of these entries can't be removed from which list?