2 Fatal Errors following upgrade to 2.10.0 (2 replies)

I just tried updating to the version 2.10.0 automatically and it appears to have failed and I'm now getting the following two errors when I try to go to the login page...

Fatal error: Class 'Piwik\Plugins\CoreHome\Columns\Metrics\EvolutionMetric' not found in /home/jamsee4/ipfreelyproxies.info/piwik/plugins/MultiSites/Columns/Metrics/EcommerceOnlyEvolutionMetric.php on line 22

Fatal error: Class 'Piwik_Plugin' not found in /home/jamsee4/ipfreelyproxies.info/piwik/plugins/ExampleUI/ExampleUI.php on line 27

Please help.

Thanks!

Tex