If I were you I would leave it as it is, you will have a lot of work taking down the cover and then having to put it back on after your veg are harvested which could be late in the winter, when this is the time your tunnel will come into its own for starting off tender crops.
Put in your autumn potatoes and perhaps a late crop of carrotts and start planning for your great early crop such as strawberries and salad crops and then for tender crops such as tomatoes, peppers, melons cucumbers which all benifit from protection.