Welcome to the board and back to diving.
Great question and I congratulate you on your decision to seek out refresher training. That is a prudent choice given your long absence. If you own your own gear, don't forget to send it off for maintenance before you get it wet again as age, and potentially moisture will take their toll on seals, o-rings and metal parts (rust inside a first stage is a killer).
Given that your total lifetime dives (4) have been the Basic Open Water Certification Course 5 years ago, you should take something with classroom and pool sessions, open water work. In short your refresher course should look remarkably like a Basic Open Water course. I would imagine that without the immediate reinforcement of say 40-50 dives after certification that you have retained very little of what was taught, and some things have changed in 5 years. My guess is you are a little ahead of a person who has never been trained, but not much.
Even if you remember everything like it was yesterday, there is a difference between remembering and doing. I know from experience that in an emergency, you will do what you have been well trained to do and practiced, practiced, practiced until it became second nature. Then when the s*&t hits the fan you react without thinking about it with the skills you have been trained to use. With only your BOW and no other dives to reinforce and refine those skills (the typical newly minted diver usually really has a license to learn SCUBA) you should review under supervision and practice all the skills again.
The shops that say "we just hook you up with an instructor and start diving and working on things" is just a little too laid back and loose for me. too easy to miss something and not cover a skill because it does not come up on a particular dive, but might in an emergency. A well organized review and practice session in a pool to ensure you cover every skill taught in the BOW is what I would want.
Again welcome to Scubaboard and back to SCUBA diving.