Maybe a stupid question but how easy is it to rename archives? I have quite a few archives with similar names and wanted to rename them more clearly but don't want to do it only to find everything goes horribly wrong.

If you just want to rename them (in place), it shouldn't be a problem.

Things get a tad more complicated if you move the archive and rename it, or relocate it to a different volume. But QRecall shouldn't be tricked by simply renaming it.

The worst that can happen is that your actions fail to locate the renamed/moved archive. To rectify that, simply open an action, choose the new archive, and save it again.