fatal error, conflict with another plugin

Dear Pupunzi,

I already posted my concern 2 months ago but till now received no reply from you.
See: https://wordpress.org/support/topic/fatal-error-conflict-with-another-plugin-3/

Unfortunately I have to inform you that with the latest update to 3.6.0 the previous mentioned critical error is there again.
Can you please resolve?

With regards,
D.V.