Accidentally number renamed without padding

[DKDiveDude]

I accidentally renamed a bunch of files, using "Numbering". Problem is I forgot to use "Pad" = 2.

Now I got files like the examples below. Besides the tedious way of manually renaming all the 1-digit files, is there an easier way?

file-a-1
...
file-a-9
file-a-10
...
file-a-99

and

file-b-1
...
file-b-9
file-b-10
...
file-b-99

[Luuk]

For the examples, RegEx(1) can use a "Match" and "Replace" like...
^(file-[a-z]-)(\d)$
\10\2

NowName --> NewName
file-a-1 ----> file-a-01
file-b-2 ----> file-b-02
file-z-3 ----> file-z-03
file-a-99 --> (not renamed)
file-b-11 --> (not renamed)
file-bb-1 --> (not renamed)
text-a-1 ---> (not renamed)

Related posts for padding the numbers...
http://www.bulkrenameutility.co.uk/forum/viewtopic.php?f=3&t=6100#p16913
http://www.bulkrenameutility.co.uk/forum/viewtopic.php?f=12&t=6376
http://www.bulkrenameutility.co.uk/forum/viewtopic.php?f=3&t=6487

[DKDiveDude]

Thank you very much for you time offering a solution.

Not your fault, but the solution you offered did not work. It is because I did not provide an accurate enough example of my filenames.

They are actually more like this;

Cat1 - 1912 - 1.jpg
..
Cat1 - 1912 - 10.jpg
..
Cat1 - 1912 - 99.jpg


Cat1 - 2465 - 1.jpg
..
Cat1 - 2465 - 10.jpg
..
Cat1 - 2465 - 99.jpg

[DKDiveDude]

Ok it seems I found a solution to rename more easily than manually!

In the Menu; "Display Options", "Sorting", I selected "Logical Sorting".

Then the files at least shows in the order
...1
...2
...10

instead of

...1
...10
...2

and then it is easy to use "Numbering" again to rename a batch at a time, to correct my error!

[Luuk]

Yes, the answers should always be based on example Now-names ---> New-names.
To pad the latest examples, Regex(1) needs a "Match" and "Replace" more like...
^(Cat\d+ - \d+ - )(\d)$
\10\2

To pad names ending with a space, then 1-digit, its like...
^(.+ )(\d)$
\10\2

To pad any names ending with only 1-digit, its like...
^(.+[^\d])(\d)$
\10\2