From my homepage if I go:
Dashboard > News > Learn more and update
I get a Page Not Found

If I go:
Dashboard > System and Settings > Update concrete5 > Download
I get Fatal error: Allowed memory size of 16777216 bytes exhausted

:( I am really just trying to fix my eCommerce, when I click on any of my products it just brings me to a blank page and none of the Dashboard links/settings for eCommerce are working either.

I hope someone can help.