I know I won't be answering your question directly, but if you think you're likely to be interested in the rest of EastWest's catalog too, an alternative might be to go with their subscription model for about $30 a month, . It has Symphonic Orchestra gold, and would allow you to access it without the upfront cost.

http://www.soundsonline.com/composercloud

Part of what I do is being an IT security professional, and in my opinion: you shouldn't bother with antivirus.

It's not just that antivirus software has a tendency to be ineffective in the real world, it can also create whole other levels of bad (sometimes going as far as to lessen the security of your machine, by screwing with HTTPS connections for example).

You will be much better served making sure you:
1. use Chrome as your browser (stays up to date for you, and has good defaults tuned for your safety: it really is your first line of defense). Bonus points for adding uBlock origin and Ghostery as extensions, as ads on the Internet aren't just annoying, they sometimes serve malware, even on reputable sites.
2. keep GateKeeper enabled (the OSX security feature that enforce your applications be digitally signed) – You might have to "Cmd+click -> Open" some of the software you get (looking at you, fxpansion) because not all developers do the right thing when they distribute applications or software instruments, but they should be treated as a careful exception.
3. Invest in using a password manager so you never reuse the same password on any site (I strongly recommend 1Password for that job: https://agilebits.com/onepassword ).
4. when you download software for music production or otherwise, don't do it on free WiFi from cafés, airports, etc. Some developers don't serve their software over HTTPS, which means if the wifi hotspot you're connected to is bad, it can replace what you're downloading with something that's going to make you have a bad day. As a matter of fact, you should never do anything important on the Internet when it's not on HTTPS (and yes, downloading anything enters the 'important' category).

If you really care to go the extra mile:
5. install this little gem: https://objective-see.com/products/blockblock.html which will alert you anytime something potentially fishy tries to install itself on your machine
6. get the LittleSnitch app ( https://www.obdev.at/products/littlesnitch/index.html ) to serve as your firewall, so nothing talks to the Internet without your express permission.

Last but not least:
7. Don't connect crap to your computer (anything on your USB / Thunderbolt / or even display port that could be dodgy... avoid, including unknown USB sticks from friends)
8. Stop pirating software. Seriously. There is no knowing when great stuff from the pirate bay turns out to be bundled with something that's going to bite you in the ass. An extension of that: dodgy stuff downloaded from the Internet is an instant "nope". Software from makers your recognize only, and from the App Store. That's it.
9. Backups, backups, backups. Whether you use an Apple Time capsule or an external hard drive, time machine isn't optional if you care about anything you do or store on your machine.


If you do all of this, you'll most likely be better protected than 95% of the people around you. Even those using an antivirus

I run with Javascript activated in my browsers and it's fine, so the problem is probably a bit deeper (and again, some extensions have an unknown tendency to mess with things, so you always need to be careful what you run with).

In any case, I'm happy you you found a solution.

Hi!

I tried to reproduce your problem, but couldn't make it happen on my end. We changed the forum's hosting and a lot of server configuration in the past week, so it's possible it had a good impact on the issue. Please be sure to let us know and post a screenshot if it happens again though.