#1231 Program dies

[Anonymous]

program.name=DocFetcher
program.version=1.1.18
program.build=20160725-2146
program.portable=false
java.runtime.name=Java(TM) SE Runtime Environment
java.runtime.version=1.8.0_73-b02
java.version=1.8.0_73
sun.arch.data.model=32
os.arch=x86
os.name=Windows 10
os.version=10.0
user.language=en
java.lang.NumberFormatException: For input string: "2w (1)"
at java.lang.NumberFormatException.forInputString(Unknown Source)
at java.lang.Long.parseLong(Unknown Source)
at org.apache.lucene.index.SegmentInfos.generationFromSegmentsFileName(SegmentInfos.java:226)
at org.apache.lucene.index.SegmentInfos.getCurrentSegmentGeneration(SegmentInfos.java:161)
at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:644)
at org.apache.lucene.index.DirectoryReader.open(DirectoryReader.java:75)
at org.apache.lucene.index.IndexReader.open(IndexReader.java:462)
at org.apache.lucene.index.IndexReader.open(IndexReader.java:322)
at org.apache.lucene.search.IndexSearcher.<init>(IndexSearcher.java:93)
at net.sourceforge.docfetcher.model.search.Searcher.setLuceneSearcher(Searcher.java:235)
at net.sourceforge.docfetcher.model.search.Searcher.access$000(Searcher.java:83)
at net.sourceforge.docfetcher.model.search.Searcher$2.handleExistingIndexes(Searcher.java:170)
at net.sourceforge.docfetcher.model.IndexRegistry.addListeners(IndexRegistry.java:298)
at net.sourceforge.docfetcher.model.search.Searcher.<init>(Searcher.java:166)
at net.sourceforge.docfetcher.model.IndexRegistry.load(IndexRegistry.java:395)
at net.sourceforge.docfetcher.gui.Application$6.run(Application.java:519)