Hi Uroni,
can you tell me the need or sence of this setting? As far as I understand: nightly UrBackup deletes backups exceeding the defined value for “maximum number of backups to keep” and if there are more, it deletes as much as needed from the oldest on to fulfil this setting. Isn´t it?
Suggestion: drop this setting and use horizontal slide bars for the number of backups to keep and alternatively a text field. Most users I think will define anything between 1 and 40, for users that prefer unrealistic settings like 1000 they can use the text field.
Best regards, Jochen