Current portable version broken?

I just downloaded the version

4.5.9 (2600)

(ZIP File), verified the checksum and unzipped everything into a freshly created directory (c:\p\pspad). Clicking on PSPad.exe did not start the editor, but opened a dialog box complaining that the file could not be accessed!

This image shows the Explorer window from where I started the file:

This image shows the error message:

The operating system used is Windows 7.

Since I have nearly all my programms organized within C:\p\SOMEDIRECTORY the error is unlikely related to missing permissions for this directory. Could it be, that the current portable version of PsPad is broken?

--
Ronald Fischer (Germany)

Portable and installer are same.
Try to download current build from Developer forum and replace existing files in your folder.