Re: MPLAB X IPE v5.05 cannot export hex file: "Please Select a Device"
Had the same problem on a different platform:
Host OS = Windows 10
Microchip IPE = v5.15
Programmer = PICKit3
Happened right after PICKit3 firmware was updated for the target 18F252.
Solution: After the programmer's FW is updated, unplug it from USB and plug it back in. Then close IPE, start it again, and read the chip again.
Now when one selects File, Export, Hex you will get a file system browse box instead of the misleading error message, and it'll export the file OK.