Curtain detached from runner at one end.

Would be very grateful for advice on how to deal with one end of a curtain that appears to have lost its runner ? 
The brown cloth curtain is fixed to a plastic tape, with what looks small white squares stitched every few inches and plastic runners that are slotted into the curtain track. The squares look like Velcro stitched in. 
It is difficult to see how the curtain and tape can be removed from the runner to get a better look as very little space at either end.
The problem I have has left a section of this tape sticking straight out about 3 inches / 7cm and it is not clear how to re fix or what is missing to do so.
Grateful  for any advice.
Michael.

A photo would probably help but before you do that it would be nice if you introduced yourself as requested in the info for new members.
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Have just posted  Hello. Which I had previously thought I had, but new to this website. Thank you for pointing out..