error writing to 4.db cache file after upgrade

We upgraded yesterday to 9.3 Enterprise and started an analysis of our log files, after some hours (big logs) it fails and we get and error pop up saying
Cannot save data to cache file E:\progamdata\WebLog Expert\Cache\AnalysisCache\4.db

The file is there but is 32GB in size, wondering if it’s a size limit but not sure how to continue
Any ideas?
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