yep...I have no idea why your system is having an issue...I've seen it in this community over the years, for about 1 in 10,000 posts (bold guess) .
I've used desktop TTX with Windows for more than 20 years, and never had a file disappear with an update.
There have been some occasional issues with brand-new computers with the most recent SDDs, or with Windows 10 PRO and file access permissions.....but not with normal installations of W10 Home edition.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
