Sometimes this only needs closing the software, then re-opening it.
Other times it requires a soft re-boot of the PC. And this is stand-alone only, not networks.
This happens more with my Win10 then ever before with my Win7.
Which has this broken Link https://accountants-community.intuit.com/articles/1861515-error-this-file-is-currently-locked-by-ano... Maybe @IntuitAustin or @IntuitBettyJo could get the repair crew out to work on it.