rename clear option to preload_clear

README.md

@@ -59,9 +59,6 @@ aquatic-crawler --infohash /path/to/info-hash-ipv4.json\
 
           [default: ei]
 
-      --clear
-          Clear previous index collected on crawl session start
-
       --infohash <INFOHASH>
           Absolute path(s) or URL(s) to import infohashes from the Aquatic tracker JSON/API
 
@@ -105,6 +102,9 @@ aquatic-crawler --infohash /path/to/info-hash-ipv4.json\
       --preload <PRELOAD>
           Directory path to store preloaded data (e.g. `.torrent` files)
 
+      --preload-clear
+          Clear previous data collected on crawl session start
+
       --preload-regex <PRELOAD_REGEX>
           Preload only files match regex pattern (list only without preload by default)
           * see also `preload_max_filesize`, `preload_max_filecount` options