Help with Opera

Can anybody tell me why I get this message while trying to download from this link.

http://www.gentlesecurity.com/files/geswall.2.5.1.pro.msi

The link used to work OK in the past in Opera. I suspect some settings/ tweaks have broken something.
Could not find anything from plugin help page.

My opera settings are:

Version 9.1 build 8579
java, javascript turned off with java script turned on on selective sites
Cookied denied except on selective sites and autoclear cookies on sesssion end

Thanks