Missing transactions when upgrading from 2017

Hi, I am a 2017 user and recently had to reset my computer and decided to subscribe to the latest version of Quicken so that I could continue to use Quicken.

I have transactions dating back to 2000 and my QDF file is ~400Mb.

After installing the latest version of Classic and opening my QDF file, I noticed that

• transactions from the last 3 to 4 years were missing which causes an improper current balance
• some accounts have the name as N/A and have nothing in Account Details and I can't figure out a pattern for why some became N/A
• comments I wrote in the account details were not 'brought over'
• 1 account has the correct balance but with no transactions (newer account)
• 1 loan account has no loan details, the other has details
• The errors in the log indicate Category errors and a couple transaction errors

I tried the following -

• restore a backup and got the same issues
• validate the original files as well as a few of the quicken backups
• Note that 2017 was working fine until I reset my computer so no issues with the data file

Quicken support could not help so I am turning to the community to see if anyone has any ideas and if I will continue to be a Quicken user

Thanks!

Ken