You may, or may not, want to perform an upgrade until after your season is over. This is because, the new version needs to be treated like a brand new program, as opposed to a typical update. See below for specifics...
Do not uninstall your old version of Box Office Xpress Junior before you install the new version.
If appropriate, you may want to print out some historical sales reports before uninstalling
If you have a version of Box Office Xpress Junior installed before version 4, then do not install version 4 in the same folder as your current version. The installation will, by default, install to a new location. You may use the default or some other location, so long as it isn't the same folder as the previous version.
This is the biggest upgrade since 1999. As such, the way data is handled has changed significantly. Consequently, except for customer data, you will need to re-enter everything (seating, events, pricing, etc.).
To learn how to transfer your customer data from the previous version to the new version, open the Help system and search for ... Transferring Previous Customer Data. It's a very easy process.
You may wish to use the previous version of the program as a reference for when you re-enter your data, such as your seating charts.
After you transfer your customer data, and have no further use of the previous version of Box Office Xpress Junior, you may uninstall it - unless you wish to use both programs side-by-side (see Running Both Versions, below).
Running Both Versions
If you don't have a clear end-of-season, or if you just wish to start using the new version right away before your season ends, you can operate both programs at the same time.
For example, you can continue to sell tickets for events already in your previous version and, in the new version, you can set up new events and start selling tickets for them.
Note that, when doing this, any changes made to customer addresses in the old version will not appear in the new version.
Also, sales information, such as Daily Sales reports, will need to be generated from both programs with the totals added together.