Error ocurs: Cannot access index\segments

Popup occurs with following text:

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An error occurred and have been logged to file
C:\Documents and Settings\Nicole\Application Data\RssBandit\error.log.

Please report it's content to the dev.rssbandit.org development team along with the following information:

The process cannot access the file "C:\Documents and Settings\Nicole\Local Settings\Application Data\RssBandit\index\segments" because it is being used by another process.

Attached is the error.log file.