Can a checking account be moved from one Quicken file to another?

Mikey S

Due to something gone wrong with my established 25 year old Quicken file, (1 account out of 5 Schwab accounts will not One Step Update). So, I need to move the 25 years old checking account data file from that original Quicken file to the new Quicken file on which the One Step Update functions correctly. Any help will be greatly appreciated.