There is good news and bad here.

The bad is photocopier boat design doesn't work. The good is if it did I wouldn't have a job.

If you just scaled everything up equally the displacement would be wrong. For example if you make everything 10% bigger the boat's volume goes up by over 30%. You could just stretch the boat to 14ft but it probably still won't float right so you then need to scale beam and depth. Generally these need to kept in proportion to each other for the shape to work and now unless you have suitable software you can't use the existing geometry for hull sheets etc.

You 14ft boat will be faster than the ds12 so the foils can be reduced in size in proportion to the square of the increase in speed.

If you are using a trap and have more righting moment you'll need to scale the dagger boats up to tailor for the increase side force.

If your mast is taller you end up with a higher heeling moment for a given side force so you can scale the foils back down.

Unless you've scaled the rudders the same amount as the daggers your clr has now moved so you'll need to either resize them or move the daggers for or aft.

Etc etc. It is possible and may be an interesting project. But you might be better off starting from an existing design at the right size and tweaking instead of scaling.