Hey Guys,
BETA 75 Pro, f4 fr 2s v1.0
Landed in snow. Accidently plugged 3s instead of 2s. Thiught board was fried as small spark and woukdnt even power up after that. Gave it a isopropyl bath, a lot of salt was between pins and solder joints. Board powers up..binded fine..connects betaflight. Wont read escs through beheli32. Using dshot 600..battery plugged in..2s lol.. all SMD components intact nothing broken.. sugestions? I want to do a firmware flash but it was loaded with beta v4.0 by default and apparently a trial version..should I go back to 3.5? Target is matekf411rx.. thanks.

As far as I know, that board has BLHeli_S ESCs and not BLHeli_32 ESCs.

Try using the normal BLHeli Suite (not the BLHeli32 Suite).