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Internet software provider Starbase Corp. in Santa Ana said its fourth-quarter loss widened to $6.4 million, or 11 cents a share, from $2.9 million, or 7 cents, a year ago. Revenue soared to $16.6 million from $6.2 million. . . . Prolong International Corp., an Irvine marketer and distributor of industrial and automotive lubricants and appearance products, reported first-quarter net income of $44,560, compared with net income of $640,820, or 2 cents a share, a year ago. Sales declined 46% to $4.2 million.