Delete Cache - Click this only if you have e.g. imported a wrong target URL list or think you want to clear the URLs that a previous search task found.
Delete History - Click this if you..
a) want to submit to sites that you previously skipped (e.g. you didn't want to enter captchas back than but want to do now)
b) think it found sites in the past that it skipped but are now supported by e.g. new added engines
c) think it found sites in the past and somehow your internet connection blocked it to get sent to (proxy issue e.g.)
Comments
Delete Cache - Click this only if you have e.g. imported a wrong target URL list or think you want to clear the URLs that a previous search task found.
Delete History - Click this if you..
a) want to submit to sites that you previously skipped (e.g. you didn't want to enter captchas back than but want to do now)
b) think it found sites in the past that it skipped but are now supported by e.g. new added engines
c) think it found sites in the past and somehow your internet connection blocked it to get sent to (proxy issue e.g.)