Awaiting delivery of a CH341 programmer and clip

Will a new BIOS flash wipe away the password, or are any other steps needed. Also, with dual BIOS, is it enough to do the main only?

Also, from the bit on the programmer, is it right that the board may need to be powered up to ensure the 3.3V supply?

PS. I have a normal soldering iron (no SMT stuff), would it be safer to desolder the chip and do it that way, fortunately it's quite well in the clear for clip or soldering access

Also, will probably UBU tweak the BIOS