I have looked around the various sites and this forum, and the more I read the more confused I become

I recently picked up a Magellan Explorist 710, which seems to be doing a pretty good job at the moment. I am finding my way around the unit slowly, most of the functions are quite intuitive and easy to work through.
GC terminology and etiquette are something I will pick up the more I read I'm guessing.
I'm not much of a tech head so some of the software requirements are leaving me a little confused. Sorry in advance if I'm about to ask any of the same old newbie questions

1. Can't load caches from the GC site via 'send to my GPS'.... I have registered my unit with Magellan, activated the free 30 day premium membership offer that came with the unit, loaded the 'Magellan Communicator' to my pc via the Magellan website, but when I try and load a cache to my unit, I am met with one of two pop up windows. Neither of which will allow me to progress further than the pop up. I have followed the obvious instructions on the two pop up windows but nothing happens. I accept the agreement, submit, and it just shows the same window saying, you must accept before continuing. I try and go to Magellan, or any of the other tabs for that matter, on either window, and nothing happens. The only one that works is the DeLorme tab, which is the one it pops up with. It gives me the option to download a plug in for DeLorme. The funny thing is, if I access the site using my phone, it works, I can access the Magellan tab? Firewall issue on pc? But It wouldn't work at all if that was the case wouldn't it?


2. When I search GCA for caches near me, plenty appear on the list, but when I click on them, I am directed to GC for any info or download options. This isn't a big deal really (other than issue 1 at the moment lol), but just seems strange. I'm guessing they are loaded to GC when they are initially logged?
3. Any caches I find that are accessible through GCA, seem to only send to Garmin units? Is GCA racist lol?
4. Can I 'send to my GPS' multiple caches at once, or do I have to tick them all separately?
5. I'm hoping to find my first few caches today, and was planning on just logging them on my pc, but is there a preferred phone app (I have a windows phone) that people use to log in the field?
I think I should stop there

Anyway, any help would be much appreciated
John