SLADE 3 (error opening file for writing)

I'm running Windows 7 Home Premium x64. I've tried to install SLADE 3 only to receive a message saying "Error Opening File for Writing: C:\Program Files (x86)\SLADE3\SLADE.exe", ultimately giving me the options to abort, retry or ignore.

I've installed both x86 and x64 Visual C++ 2010 runtimes, and that didn't do a thing to help. The file is not corrupted since I've re-downloaded, download in question being the SLADE v3.0.2 Windows installer. Would really like to get this working since XWE has been long left for dead.

Haha, I fixed that so long ago, I forgot it was in the beta 3.0.2.

Try an SVN build of SLADE from the DRD Team site.
http://svn.drdteam.org/slade/