Some tuners disable reading the ECU flash memory by disabling support for the UploadFromECU KWP2000 message.
If you attempt to read the flash memory, and the log file says something like "ECU reports UploadFromECU is not supported, it may have been disabled", then you can't read the flash.
You can read the flash memory if you read it in bootmode. I will eventually add premium support for bypassing tuner protected when reading flash memory.
Any idea, when you might possibly be adding this feature in the premium version?