You have downloaded the demonstration version of Reval 3. It is fully functional for 30 days. After 30 days, you will no longer be able to update quotes or perform other Reval functions, but your data will be preserved. Registered users (including registered users of prior versions) can use Reval 3 forever.
If you want to use Reval for tracking options, you can check out the option features for 30 days, too. You do not have to start your 30-day option trial right away, though. The option trial starts when you want. If you purchase a regular Reval registration, you can upgrade to use the options features permanently for an additional fee.
Open Reval 3 like you would any Excel document. Excel may ask you if you want to enable the macros in Reval 3. If it does, click on "Enable Macros" to proceed. If you are not asked that question, don't worry about it. Reval will work normally.
This software's licence is Shareware - Unlimited, which means that the current version is free of charge for now; no time or feature restrictions in this version.