Hi dyann
The post that Earl_HD linked in his article has a link to the cache clearing instructions They are a little out of date in that the location is now:
C:\Users\<usename>\AppData\Local\MYOB\AccountRight\Current\Cache
FYI - syncing between local and online files ceased in 2020. Nowadays the file can only exist in one location, and can then be moved from online to offline by backup and restoring. Whether you access an online file via the desktop application or the browser, you should see the same thing as you are accessing the same file. However as Earl noted, sometimes use of cached files does lead to display issues.
Regards
Gavin