Book source doesn't match Book viewer

Hi everyone. Having some difficulties with RAB today. I’m trying to update a text with some orthography changes. I updated the file from its original source, so now it shows a file with a Last Modified date of today and this is what shows up in the Source tab for the book. However, RAB keeps creating timings based on the older version of the file that used to be there and no longer exists as a file on my computer. This is also what shows up in the Viewer tab.

Update: For anyone else who has this problem, I had to close down RAB and reopen it. Voila! The two tabs now match.