Additional Caching - login error

I set the option in the admin-caching-additional caching-Enable and now can not log in to your account.
Error messages in ... / login.html:

Undefined property: cache: $ cache (# in / functions / cache.php on line 131
or
Array to string conversion (# in / functions / blog.php on line 600

I do not use a blog or forum, just download. Cache I delete, but nothing does not help, I can not go back, I was allowed in conf.php blog and other errors occurred.
Please help.

Some caching functions may conflict with other Diferior features. These features are mostly reserved for very high-traffic sites and are of no use to most users. You can disable additional caching in conf.php by hand by modifying true/false values.