Question types can only be changed during the import phase. Dapresy will try to recognise the question type, but unfortunately this is not always possible in an automated way. 

Once you open the meta data transformation you can see what Dapresy selected to become the question type per question. Scroll down and check those to make sure this is al set correctly. In case you need the question type to be different:

In the example above you can see that Q2Numeric with question text age is recognised as an open numeric, which is correct. However, if your age question was categorised into for example categories like younger than 35 and older 35, you would like this type to be single response. You can change this by clicking on the type itself and a drop down appears. Here you can select the Single Choice type, see image below.

What else can you do during the meta data transformation?

All done? Continue!