Search unavailable

I am using the trail lite version of the search 1.7.2 on DNN 7.03, we have purchased the full version but I wanted to test on our Dev site before installing the full version on the live site.
I have installed the Shared common module and the iFilters for word and pdf have been installed.

I did have the search running and was having a go at some of the settings then I started getting,

Error: Search is currently unavailable. DotNetNuke.Services.Exceptions.ModuleLoadException: this IndexReader is closed ---> Lucene.Net.Store.AlreadyClosedException: this IndexReader is closed at Lucene.Net.Index.DirectoryReader.Terms(Term term) at Lucene.Net.Search.TermRangeTermEnum..ctor(IndexReader reader, String field, String lowerTermText, String upperTermText, Boolean includeLower, Boolean includeUpper, CompareInfo collator) at Lucene.Net.Search.TermRangeQuery.GetEnum(IndexReader reader) at Lucene.Net.Search.MultiTermQuery.ConstantScoreAutoRewrite.Rewrite(IndexReader reader, MultiTermQuery query) at Lucene.Net.Search.BooleanQuery.Rewrite(IndexReader reader) at Lucene.Net.Search.BooleanQuery.Rewrite(IndexReader reader) at Lucene.Net.Search.IndexSearcher.Rewrite(Query original) at Lucene.Net.Search.Query.Weight(Searcher searcher) at Lucene.Net.Search.Searcher.Search(Query query, Filter filter, Int32 n, Sort sort) at Aricie.DNN.Modules.LuceneSearch.Business.PortalQueryingDriver.RunQuery(Int32 searchModuleId, Query objQuery, Sort objSort, Int32 resultPageIndex, Int32 pageSize) at Aricie.DNN.Modules.LuceneSearch.Business.PortalQueryingDriver.RunQuery(Int32 portalId, Int32 searchModuleId, LuceneFilterQuery objLuceneQuery, Sort objSort, Int32 resultPageIndex, Int32 pageSize) at Aricie.DNN.Modules.LuceneSearch.Business.LuceneSearchDataStore.GetSearchResults(Int32 portalID, Int32 moduleId, SearchParams objSearchParams) --- End of inner exception stack trace ---

I tried uninstalling and reinstalling the search but it doesn't make a difference.
Help, what have I done.