I have found a working way:
Insert the following text to the launch data:
<stringAttributekey="com.pemicro.mcu.debug.connections.pne.arm.PEDEBUG_ALTERNATIVE_ALGORITHM_PATH" value=""/>
<stringAttributekey="com.pemicro.mcu.debug.connections.pne.arm.PEDEBUG_AUTO_SYNC" value="1"/>
<stringAttribute key="com.pemicro.mcu.debug.connections.pne.arm.PEDEBUG_CURRENT_ALGORITHM_INDEX" value="0"/>
<stringAttribute key="com.pemicro.mcu.debug.connections.pne.arm.PEDEBUG_CUSTOM_TRIM" value="0"/>
<stringAttribute key="com.pemicro.mcu.debug.connections.pne.arm.PEDEBUG_DOTRIM" value="0"/>
<stringAttribute key="com.pemicro.mcu.debug.connections.pne.arm.PEDEBUG_DO_PRESERVE_PARTITIONING" value="1"/>
<stringAttribute key="com.pemicro.mcu.debug.connections.pne.arm.PEDEBUG_ENABLE_FLASH_PROGRAMMING_DIALOG" value="0"/>
<stringAttribute key="com.pemicro.mcu.debug.connections.pne.arm.PEDEBUG_ERASE_PROGRAM_WITHOUT_ASKING" value="0"/>
<stringAttribute key="com.pemicro.mcu.debug.connections.pne.arm.PEDEBUG_NGS_TRIM_OVERRIDE_REFERENCE_FREQUENCY" value="3276800"/>
<stringAttribute key="com.pemicro.mcu.debug.connections.pne.arm.PEDEBUG_PARTITION_PARAM" value="13314"/>
<stringAttribute key="com.pemicro.mcu.debug.connections.pne.arm.PEDEBUG_PRESERVE1_ACTIVE" value="1"/>
<stringAttribute key="com.pemicro.mcu.debug.connections.pne.arm.PEDEBUG_PRESERVE1_END" value="268451839"/>
<stringAttribute key="com.pemicro.mcu.debug.connections.pne.arm.PEDEBUG_PRESERVE1_START" value="268435456"/>
<stringAttribute key="com.pemicro.mcu.debug.connections.pne.arm.PEDEBUG_PRESERVE2_ACTIVE" value="1"/>
<stringAttribute key="com.pemicro.mcu.debug.connections.pne.arm.PEDEBUG_PRESERVE2_END" value="335545343"/>
<stringAttribute key="com.pemicro.mcu.debug.connections.pne.arm.PEDEBUG_PRESERVE2_START" value="335544320"/>
<stringAttribute key="com.pemicro.mcu.debug.connections.pne.arm.PEDEBUG_PRESERVE3_ACTIVE" value="0"/>
<stringAttribute key="com.pemicro.mcu.debug.connections.pne.arm.PEDEBUG_PRESERVE3_END" value="3"/>
<stringAttribute key="com.pemicro.mcu.debug.connections.pne.arm.PEDEBUG_PRESERVE3_START" value="0"/>
Now the device will not be partition anymore and you can add the preserve ranges!
Pascal