Hello

I have run into some issue with my Bitcoin Core Client v.0.9.1

when I download the tar.gz file through Bitcoin.org the file looks like a word file and not an executable, when I try to open this file it reads the following error message,

"Could not display .... Bitcoin QT

there is no application installed for shared library files, Do you want to search for different application to open.."

Just wondering if anyone could offer some advice on how to fix this issue and why it is happening? a few weeks ago when I first downloaded the client nothing seemed to be wrong and when I tried to open my wallet today this happened,

appreciate any insight,

regards