Good news for whom wait for supporting of raw binary files from StLinkP.
Starting from release 0.35 you can keep your firmware in raw binary files and upload it on Stm32 CPU without converting its to Intel HEX format.
If you want select firmware in binary format then you need select desired file format at right bottom corner of OpenFileDialog activity
On main activity you can see label that show format of current selected file.
This update has been inspired by feedback from nurdin tegar
Please leave your feedback. We can make StLinkP better together)