Can you save the project as template?
so it carry all the project information such as Point ID, direction, sensitivity values...etc, so you won't need to change point ID if it's same from previous project.
Next time when you launch Testlab go to File->New...
Then you can select a project template you created previously, it has everything from previous project except the measurement data.
A template is really good if you run the same test with the same channels each time.
If you have to change the point ids each time, you might want to have an Excel file with the possible Point Ids, and then copy from Excel (Ctrl-C) and Paste into the Testlab Channel Setup (Ctrl-V).
One more thing, if working with a template is OK for you, you can also turn on the Add-in for Parameter Locking and lock the Point ID column so the Point ID cannot be changed. After turning on Parameter Locking, right click on the column header for Point ID and edit the properties where you can make the column 'read only'.
Additionally, this is another good option ....
The Measurement Point ODBC database is a great option! That will ensure that future measurements will have consistent Point ID's.
For data already measured, the alias table is a great feature that will resolve point id problems that have already occurred. It is available from rev 17 onwards.