Can you change a question type?

Is there a way to change the type of question (i.e. from text to integer?) or does it need to be deleted and reset with the desired question type?

I have not found any way to change the question type. In theory you could do it in the excel sheet by changing the code, but I haven’t tried it to check.

You can easily do it.
In xls form ‘name’ : just replace text’ into ‘integer’