I've just received it as well - they have my Forum username, my email address and my name.

As I can see no reason why I would ever need to install an app from this forum,it can only be spam and they have my details

Can the forum assure me that the the logon database hasn't been hacked, it certainly looks like it - I presume passwords encrypted when they were stored - can you confirm?

If it has been hacked, you need to notify everyone quickly.