I solved this problem in the digitizer macro files by converting them to commands supported by GATE 9.3. I altered scripts for the main digitizer in GATESubMacros and for each scanner in the ExampleScanners folder.
Also, you have to go to MainGATE.mac and change this:
DIGITISER
/control/execute GATESubMacros/[Name of the new digitizer mac located in GATESubMacros. Ex: NewDigitizer.mac]
Here are the scripts I did for the Digitizer. I had to put in .txt format because for some reason it doesn't let me upload .mac scripts here, but don't forget to change to that format.
NewDigitizer_D690.txt
NewDigitizer.txt
NewDiditizer_mMR.txt