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# Release notes for Recoll 1.22.x

## Caveats

Installing over an older version: 1.19

1.20-22 indexes are fully compatible. Installing 1.22 over an 1.19 index is possible, but there have been small changes in the way compound words (e.g. email addresses) are indexed, so it will be best to reset the index. Still, in a pinch, 1.22 search can mostly use an 1.19 index.

Always reset the index if you do not know by which version it was created (you're not sure it's at least 1.18). The best method is to quit all Recoll programs and delete the index directory ( rm -rf ~/.recoll/xapiandb), then start `recoll` or `recollindex`.
recollindex -z will do the same in most, but not all, cases. It's better to use the `rm` method, which will also ensure that no debris from older releases remain (e.g.: old stemming files which are not used any more).

Case/diacritics sensitivity is off by default. It can be turned on only by editing recoll.conf ( see the manual). If you do so, you must then reset the index.

## Changes in Recoll 1.22.0

2015-11-17: - synonyms - python3 compat for most filters. Appropriate shebang lines. - Windows port - New build system - Filters converted to python mexec -> faster in most cases. - Make dehyphenate (co-worker->coworker) optional