QRecall will normally check for new versions and automatically upgrade itself. See general preferences to set the frequency.
The simplest way to upgrade QRecall is to let it upgrade itself:
To upgrade an installed copy of QRecall from a downloadable disk image of QRecall:
The Install QRecall application will take the correct steps necessary to smoothly replace your installed copy of QRecall with the one on the disk image.
To manually upgrade an installed copy of QRecall:
If you want to downgrade QRecall, you must first uninstall it. QRecall will automatically upgrade components, but it won't (as a rule) overwrite a newer component with an older one.
Warning: actions and archives written with a newer version of QRecall may not be compatible with earlier versions. Refer to the release notes for archive compatibility.