Have you been backing up? Your data file is not kept in the program. It is in your Documents then in a Turbo Tax folder. Your data file ends in .tax2019. Back that file up to an external location. Actually backup the whole Turbo Tax folder. Or copy it to a flash drive to save a copy.
How to manually update Turbo Tax program for Windows,
https://ttlc.intuit.com/questions/1901192-manually-update-turbotax-for-windows-software-basic-deluxe...
Troubleshooting update issues on Windows
https://ttlc.intuit.com/community/troubleshooting/help/troubleshoot-turbotax-for-windows-updating-is...
