i am trying to update windows mobile on my htc touch pro2 (sprint). I am not sure how to update it, because when i update it it gives me a notification Not enough disk space to download. Delete some files first. It is currently 6.1 and HTC released a 6.5 update.

Am I supposed to delete the 6.1 first then download the 6.5?
In my Storage i have 114.69 free and in my Program I have 42.92 Free.