latest build crashes on mac os

[btoole]

Get this when starting any of the latest builds on a mac [ 0.9.3 works fine ]. I click OK and app quits straight away.

Invalid amount for -paytxfee=<amount>:'0.00' (must be at least 0.00001000BTC/kB)

Anybody any ideas on how to fix ?

Thanks !!

edit : never mind - edited the bitcoin.conf to reflect the correct amount