We are aware of a new bug in Serato DJ 1.9.6, that prevents you from searching through user-created crates, after choosing a column (say BPM), then pressing the relevant keyboard shortcut to jump to a desired value (say "93"). This functionality is usually only possible when 'Playback Keys Use Shift' is enabled.
We are currently investigating this, and hope to provide a fix as soon as possible.
As a work-around, you may try toggling (disabling then re-enabling), 'Playback Keys Use Shift', under Setup --> DJ Preferences in Serato DJ. This should resolve the issue temporarily, until Serato DJ is restarted (whereby the work-around will need to be re-employed).