You seem to have got it ok!
At this time, nobody can NetFile returns for 2013 or earlier years, with any software or on-line tax product.
But you can still use software for 2013 or earlier to prepare T1 returns to be mailed in.
The real purpose of tax software is to help you through the return, identify any credits and deductions and make sure all the math is done right. On line filing is a cost-reduction for CRA, which is why they offer NetFile as a free service. From a taxpayer standpoint you may get your refund 2 or 3 weeks sooner at the height of the tax season. No big deal.
