I'd add the following steps
1a. Generate some reports of the data and transactions.
1b. Do a "Validate" on the Q data file. I've seen reports where Q messes up the data if there is any corruption or inconsistencies in them. This is why I recommend doing a manual backup first.
1c. Generate the same reports as before and compare to original reports. If differences, you need to resolve what they are, why they happen and fix them.
1d. Browse for a while and check that nothing has changed....
We now return you to the original process................ ;-)
Also, add Step 1b...