You can. But I think you should postpone for few more days, maybe wait until Joomla 3.5.1 release. The reason is because right now, there is an issue with version 3.5.0 which might causes issue with mail function on your site (might only happens with some special case, but might be applied to your server). See
github.com/joomla/joomla-cms/issues/9373
Regards,
Tuan
