I was looking for an answer on the same question.
We are still on QV 9. In prior versions this was possible. For applications for which we did the setup before upgrade to QV 9 it is still working (script is available in the distributed application). Can not find it back via QMC or QEMC (suppose the setting is removed).
Found back that this is saved in C:\ProgramData\QlikTech/Publisher\CommandCenter\QVPR\DocumentTask.xml.
Edit the xml file and change SetScript="BinaryLoad" into SetScript="LeaveAsIs'.
Don't know if it is still the same in later versions.
In 11.20 the same file still exists, but it is located in the following directory: ManagementService\QVPR
If you edit the file C:\ProgramData\QlikTech\ManagementService\QVPR\DocumentTask.xml, you'll find the SetScript setting at around line 25. The default setting is "Clear". Dunno if changing this to "LeaveAsIs" still works...