I wonder if some of you tried to make this board work with Arduino IDE.
https://www.mikroe.com/clicker-stm32f4

It has USB HID Bootloader and it shows up as HID-compliant vendor-defined device. While in bootloader mode, when the boot button is pressed, the mode lasts for 5 sec.

There is support for the chip in stm32duino (STM32F415RG). There is an option for HID Bootloader.
When trying to upload the sketch I get the message there is no COM port. Do I have to upload some random sketch first with a serial adapter? If so, what pins should I use? This board doesn't have exposed PA9 and PA10. They are used for other things. They are only USART1 pins.

Or maybe I used the wrong options.

https://download.mikroe.com/documents/starter-boards/clicker/stm32f4/stm32f4-clicker-manual-v100.pdf