Omeka upgrade issues

Got a clean install of Omeka going. Moved all files from Omeka 1.5.1 over to new server running Omeka 2.3.1.
Followed these instructions
http://omeka.org/codex/Moving_to_Another_Server
followed by these
http://omeka.org/codex/Upgrading
Now I'm getting a Zend_View_Exception error when I go to admin. It says admin/upgrade/index.php not found in path (/var/www/html/application/views/scripts/)

Tried doing a reinstall but same problem. Here's the full error code:

exception 'Zend_View_Exception' with message 'script 'upgrade/index.php' not found in path (/var/www/html/application/views/scripts/)' in /var/www/html/application/libraries/Zend/View/Abstract.php:988
Stack trace:
#0 /var/www/html/application/libraries/Zend/View/Abstract.php(884): Zend_View_Abstract->_script('upgrade/index.p...')
#1 /var/www/html/application/libraries/Zend/Controller/Action/Helper/ViewRenderer.php(905): Zend_View_Abstract->render('upgrade/index.p...')
#2 /var/www/html/application/libraries/Zend/Controller/Action/Helper/ViewRenderer.php(926): Zend_Controller_Action_Helper_ViewRenderer->renderScript('upgrade/index.p...', NULL)
#3 /var/www/html/application/libraries/Zend/Controller/Action/Helper/ViewRenderer.php(965): Zend_Controller_Action_Helper_ViewRenderer->render()
#4 /var/www/html/application/libraries/Zend/Controller/Action/HelperBroker.php(277): Zend_Controller_Action_Helper_ViewRenderer->postDispatch()
#5 /var/www/html/application/libraries/Zend/Controller/Action.php(527): Zend_Controller_Action_HelperBroker->notifyPostDispatch()
#6 /var/www/html/application/libraries/Zend/Controller/Dispatcher/Standard.php(308): Zend_Controller_Action->dispatch('indexAction')
#7 /var/www/html/application/libraries/Zend/Controller/Front.php(954): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http))
#8 /var/www/html/application/libraries/Zend/Application/Bootstrap/Bootstrap.php(105): Zend_Controller_Front->dispatch()
#9 /var/www/html/application/libraries/Zend/Application.php(382): Zend_Application_Bootstrap_Bootstrap->run()
#10 /var/www/html/application/libraries/Omeka/Application.php(79): Zend_Application->run()
#11 /var/www/html/admin/index.php(28): Omeka_Application->run()
#12 {main}

Any thoughts? (.htacess seems to be set up correctly as well, or at least it was working fine before I moved our data over)

I'd probably start by double-checking .htaccess, actually. It's different between 1.5 and 2.3, and is easy to miss when copying over files

Double checked. It's definitely there in the top folder. Am using the 2.3 version unless I'm supposed to use 1.5 instead? Haven't made any changes to it either