Inserting line by default problem

Has anyone else had this problem ? It used to work for me but not anymore. It has only started happening recently, I've uninstalled Solidworks and re installed it but the problem is still happening.

Usually when i click on line up in sktech, it would automatically choose Line for me unless I click on the drop down arrow, but now each time i click on line, the drop down arrow pops up and i need to choose line manually. It must be somewhere in the settings but i cant seem to find it 
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