Hmmm. On the EA app home page it says, "It's your last chance to get huge discounts on packs and kits", but I don't see any kits on sale. Or am I just being dim and can't find them?!
That looks so handy! I'm doing the Everything Challenge and it'll be great to have all of these listed in one place instead of hunting around for them!
Have a look at this trouble-shooting page by Deaderpool. Deleting the localthumbcache.package shouldn't make any difference to the functioning of mods. https://deaderpool-mccc.com/#/help/troubleshooting