Yeah, all files, but hmm... I tried reproduce your problem on my test forum and I changed all urls but this is only temporary solution. But you can try if you want. :P
Search for .css .js and image files and there you must change urls.
But hmm you must reinstall your forum but before, you must do backup.
When you did backup and reinstalled then you can reimport from backup database these tables:
core_members
core_member_ranks
core_message_posts
core_message_topics
core_message_topic_user_map
core_moderators
core_moderator_logs
forums_answer_ratings
forums_archive_posts
forums_archive_rules
forums_forums
forums_posts
forums_question_ratings
forums_rss_import
forums_rss_imported
forums_topics
forums_topic_mmod
core_files (upload from backup upload folder in your reinstalled forum.)
core_files_temp (upload from backup upload folder in your reinstalled forum.)
core_file_logs (upload from backup upload folder in your reinstalled forum.)
If you use downloads, commerce, blog and calendar applications, then you can reimport those tables also.
I can't suggest to you better solution. Probably someone else can suggest to you better solution. :)