Most likely you will be reinterviewed due to the time passage. They will be wondering why you did not apply after the 1st interview. There is no reason for you to expect to do worse in the interview than you did a year ago.
Contact the Navy Officer Selection Officer and make an application for the Navy Reserve. The ball continues to rest in your court. Neither the Navy or Marine Corps want officer candidates who procrastinate after being interviewed - illustrates indecision - not a good trait for a military officer. Do the application and follow through this time.
Lieutenant Colonel, US Marine Corps-Retired
EDIT: Noted your additional comment. You did n't state the circumstance of why you did not go active duty. I'm a little confused as to what you are attempting to accomplish considering that all Navy and Marine Corps officers are commissioned as Reservists except those who go to the Navy Academy (as I was). At some point in the first 2 years after an officer has been commissioned, they can apply for "augmentation" to the regular Navy or Marine Corps. If they decide not to apply, they join a Reserve unit at the conclusion of their initial active duty period, normally 3 years but can be up to six for those who go to long occupational training schools such as aviator, nuclear propulsion, etc.
I would assume (a very bad military word) that you were accepted for Navy OCS which included the mandatory interview. This would have led to the active duty period I noted above with "active" Reserve for a period after the active duty period (you would attend drill meetings, be susceptable for active duty call up, and would still be promoted. You would also have the option to accumulate total of 20 years total time with the ability to retire at age 60 (with a small retirement check based on rank/grade (eg CDR/O-5) and total time in Service.
All that being said, IF the Navy officer who did the original interview is still available, you can speak to him/her and ask that the original interview be used. Since a year has passed, I suspect that they, or another Navy officer, would want to interview you again before submitting their recommendation to Navy Bureau of Personnel (BuPers). Reason this is done is because the interview is part of the package that is presented to a Board of Navy Officers, usually with an Admiral as the Chair, who will review each package and decide who attends OCS and who does not. Generally, if the Navy OSO submits a positive recommendation, it is usually a rubber stamp process.
If your package has been sent to the Board a year ago and you withdrew your application, they will want to know what has changed - even if you plan on going into the Reserves instead of staying on active duty. The interview will be in your favor since you will be able to explain that the situation which caused you to withdraw has been resolved. The Board of Officers reviewing your package at BuPers would want to make sure that you are ready for OCS and that whatever issue you had earlier is not longer a factor. The number of OCS seats are limited so they do not want to waste a seat if there is any doubt (based on my personal experience at Headquarters Marine Corps).
Another note regarding interviews for those who decide to stay in the Reserves: When you are almost done with your short active duty period, you will want to apply to be an active, drilling, Reservist. Because you would be an officer, there must be an open billet for in the Reserve unit that you are applying. If there is, then the Commanding Officer will want to interview you and review you active duty record. Reason: more officer Reservists who want to continue in the Reserves than there are Congressionally authorized slots in most Reserve units. I have known Navy and Marine Corps Reserve officers who traveled several hundred miles just to be part of a Reserve unit that had a billet they could fill. Congress and DoD Reserve Affairs closely monitor Reserve officer billets for all four Services.
Sorry about the length of my reply, but in lieu of more detail, I thought you should be aware of the above. Do a new interview. You should do well plus you will have the opportunity to clarify misunderstanding that may be recorded in your OCS application. The Navy and Marine Corps are looking for motivated officer candidates. When someone is accepted and withdraws, it casts a question about that person's motivation and desire to be a Naval Officer. You want all those questions answered so that the slate is clear. Once you get to OCS, it doesn't matter, but you have to get through the OCS application wicket first.
Best wishes. It is obvious that you have the desire (motivation). You need to make sure that your application package, via the interview, reflects the same.