Previous update has replaced the 32 bits (PE32) version
by a 64 bits one (PE32+).
To avoid any issue for user running on 32 bits OS,
use the 32 bits version per default.
The 64 bits version can be used and is named "stm32flash64.exe"
Those binaries are now stored in "stm32flash/" directory
in order to be aligned with other host OS structure.
Serial upload has been updated and cleaned.
Signed-off-by: Frederic Pillon <frederic.pillon@st.com>
