Help! Parsing error and now can't even log into manager

I recently did a new install of Modx after my last site was hacked. I was able to get into the manager and edit resources etc with the new install, but occasionally I'd get a parsing error. Now the parsing error is appearing even if I try to go to the backend login page. The message I am getting is (I've removed my url in the line posted below);

Parse error: syntax error, unexpected 'access' (T_STRING), expecting ')' in /var/sites/5/<url removed for security>.co.uk/public_html/core/cache/lexicon_topics/lexicon/en/core/default.cache.php on line 170

See if deleting all files in the core/cache directory gets you into the Manager.