This dialog box appears when you choose the File > Preferences command from the main menu. It allows you to edit a number of settings that affect the way Publish or Perish deals with queries.
This dialog box contains the following fields and options.
Enter the number of days to keep the query results returned by Google Scholar. The longer this period, the fewer Google Scholar accesses are required to satisfy repeated queries. This both makes the queries faster and reduces the Google Scholar access rate, which is important because Google Scholar blocks further queries from a given client if it deems the access rate too high.
Any updates in the Google Scholar results only become visible after the cache period has expired, so you don't want to make this period too long. At present (early 2007) it appears that Google Scholar results are updated every few months, so a cache period of approximately 30 days seems reasonable. However, if you prefer you can make this period shorter, for example 1-7 days.
Click this button to clear the entire results cache. This forces subsequent queries to access Google Scholar directly, which might be useful after a (suspected) update on Google Scholar, or if you have reason to believe that the cached results are somehow invalid.