Hi Lolobride,
The LR upgrade process includes a backup of your previous installation's data, and you should still have your categories and other customizations once the upgrade is done.
However, we always recommend that you save a backup of your files as well, just in case you'll need to reimport your files back into LR. If you are upgrading from LR v1.6 or older, you can save your files via the Export function:
• Open LR and go to the Import/Export Screen.
• In the Export panel, choose to export Categories.
• Select the Category or Categories that you would like to export -- you can do this by holding your CTRL key while selecting each category, or select the first category in the list and hold your SHIFT key while clicking on the last one
• In the Content panel (located on the left of the Category list), make sure to put a tick mark in all boxes (pronunciations, pictures, videos, and picture audio)
• Click on the EXPORT button at the lower-right part of the screen (you will be asked for a filename and where you want to save your file)
If you also have Playlists that you want to save, you can export those separately by selecting "Playlists" at the top of the Export panel.
If you are using any LR v2 version, you may use the backup function:
http://support.brillkids.com/entries/20586247-how-to-back-up-your-entire-little-reader-libraryOnce you have a backed up copy of your files, save it where you can easily find it (but not inside any BrillKids or Little Reader folder), then proceed with installing the upgrade:
http://support.brillkids.com/entries/20370881-installing-and-setting-up-your-little-reader-from-your-brillkids-accountI hope this helps! If you need further help or if you are having any problems, kindly write to us at support[at]brillkids[dot]com