If you are using a older version of this homebrew application known as UMD Dumper, Then is recommended
to update to the latest version which is now UMD Dumper 2.2 which includes a few bug fixes from previous
version and new updated features.

Developer Statement

Quote:* Deletion of the background music.
* Added a new font, for better reading.
* Change the interface, except bootlogo.
* Removed information from the Memory Stick, and the suppression of
Info
the UMD. (check the PSP that is inserted the UMD, if Asses from
memory on the Memory Stick. (now functional).
* Deletion of my link (PAGE [PROFILE]) Facebook.
* Use simplified. (Explanation made ​​on the utility)

Source