error codes upgrading from 2.x to 3.x

Hi, I tried following the instructions for upgrading from 2.x to 3.x here - http://docs.opencart.com/en-gb/upgrading/

Here's where I have trouble.
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- Browse to http://yourstore.com/install Replacing yourstore.com with your actual site (and subdirectory if applicable).
- You should see the OpenCart Upgrade script.
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When I go the appropriate URL, I don't see any OpenCart Upgrade script, just an error which is below. I edited out my personal info.
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Unknown: Argument 2 passed to Event::trigger() must be of the type array, string given, called in /home/myinfo/public_html/system/storage/modification/system/engine/loader.php on line 119 and defined in /home/myinfo/public_html/system/engine/event.php on line 59Unknown: Argument 2 passed to Event::trigger() must be of the type array, string given, called in /home/myinfo/public_html/system/storage/modification/system/engine/loader.php on line 123 and defined in /home/ myinfo /public_html/system/engine/event.php on line 59Warning: Cannot modify header information - headers already sent by (output started at /home/myinfo/public_html/system/framework.php:42) in /home/ myinfo /public_html/system/library/response.php on line 36
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I'm at a loss on how to proceed. Any suggestions?

Thanks in advance.

Never mind, figured it out. Guess I accidentally left behind some old 2.xx files. Deleted and looks normal now.