Now I don’t know how I am going to restore the right figures.
WARNING: The upgrade process will affect all files and folders included in the main Word Press installation.
There are two methods for updating - the easiest is the one-click update, which will work for most people.
(This feature was added in 2.7, so if you are using an older version, you will need to follow the steps to update manually.) You can launch the update by clicking the link in the new version banner (if it's there) or by going to the Dashboard Updates screen.
Once you are on the "Update Word Press" page, click the button "Update Now" to start the process off.
An upgrade should also be a very well finished product, unless the manufacturer is giving it less importance because you have already purchased the product and you have to live with it. I did update "All Accounts" and it apparently did it just for those that had new transactions.
However, it also changed those transactions that I had reconciled, and in some cases where there were transfers from one account to another, they ended up considered as a deposit in one account or charge in another account, but not both simultaneously.
Search for were updating:
This means if there are any issues you can restore your website.