Computer can be either your friend, or your enemy. But doesn’t matter how you stand with computers right now, to get this job and to enjoy doing it, you will have to demonstrate good computer skills in your interview.
Employers understand that primarily we use software to prepare technical reports, charts, spreadsheets and other things (you can go around that with pen and calculator, but I don’t know anyone working that way nowadays).
An easy answer comes to mind–MS Excel. To say that you use MS Excel is a good answer. An universal tool, it offers plenty of analytical, mathematical and statistical functions. But you should not forget that MS Excel is not the only tool, and the people from the company where you apply for a job can work with something different. Therefore you should stress that you believe that you can learn to work with any software for financial analysis.
I prefer to use MS Excel, because I have been working with it since childhood. I am able to prepare illustrated technical reports and apply the most advanced mathematical and analytical functions. However, I believe my computer intelligence is good enough to learn any software, and to do it quickly.
I like to use Reports Ultimate, as it is fast and offers a large variability of visual execution for both spreadsheets and charts, what helps when presenting my reports to people without sufficient knowledge of financial terminology. However, I am ready to learn to work with any other software you use in your company.
Note: Recruiters may test your technical skills directly. They may sit you in front of a computer, and give you a set of data and a chart to prepare, or a forecast to make.
I suggest you to practice with MS Excel prior to the start of your interview, to avoid being embarrassed in a practical test, should they ask you to complete it.