use of the forum

Good morning all,
I am new and need your help. It’s very nice if you give me some time.
I do not know where I should ask my question in the forum?

Concerns: export key - wallet / Multibit / OSS
I would like to write my question for this topic but I cannot arrive on this page;

I am blocked in my approach and especially the case is particular. Please write to me if you have the possibility to help me.
I am using a translator…

Thanks everyone.