STM8 Programming
Universal Flash Loader Configurator, Universal Flash Loader, UniversalFlasher.exe or short UFL is the way to program many STM8 devices.
Flasher STM8 is a legacy product, its successor is Flasher PRO with the STM8 Adapter.
Projects which were created for the Flasher STM8 are not supported by the Flasher Pro. Create a new project with the Universal Flash Loader to program your STM8 device.