Do realize you have to have purchased the airline ticket with your PLAT to invoke the insurance...I realize this is of no help now, just sayin' for future reference.
I'm not sure you get help with having to replace airline tickets. It's more for covering your hotel should you become stranded in the airport - in the U.S. you get $250 to cover your hotel bill if you can't get out by 9 PM.
Also, U.S. based protection means you WILL get $500 to replace your personal items if your bags are more than 3 hours late and up to $2K if they're gone for good.
I've used this program a few times with zero hassle whatsoever, but I do also ordinarily buy a Travelguard policy to cover airline "gotchas," particularly on the legacies. Of course, the picture may be totally different for the non-U.S.-based protection.
Good luck, sincerely.