Archive old Quicken files

I've been using and updating Quicken for many years. Credit cards and back accounts have changed but I've never cleaned out the old and organized everything. Now it has become confusing and unmanageable by me. I would like to start from scratch retaining only my one credit card and bank account and this year's expense records. If possible, I would like to archive the rest just in case it's ever needed. Is this possible and practical?