Our Museum has no resolution to why events blog page links result in 404 errors. We’ve read the community discussions, fixes, reversions, etc. using free version Events Calendar. Resaving permalinks every hour, or deactivating plugins and re-adding them singly, reverting to original child themes, are not resolutions. We’ve dealt with this for 3 weeks since upgrading to WP 3.9.2 and are apprehensive it will only worsen after upgrading to WP 4.0. Now after paying $100 for Calendar Pro this week, we are not satisfied that your product is what we need and are looking for other solutions. Please refund the $100 for the Calendar Pro add-on. Thanks.