Hi Pilou - right now the way to divide into equal segments is to draw one point object (under Draw curve / More), and snap it on to the curve. If your curve is open, place it at an end of the curve, if your curve is closed just put it anywhere directly on the curve.

Then select the point, and run Transform / Array / Curve.

Pick your curve as the path, and then set the Item count to be the number of segments you want. If you want to divide the curve into pieces of a specific length, enter that length as the "Distance" value here instead.

Then push Done and you will have points arranged on your curve marking the different sections.

Then to cut the curve, select the curve and run Edit / Trim, select the points as cutting objects, and push Done to keep all the pieces, and you will have your 5 equal sized pieces.

- Michael