Build 4.0.0.76 of xlsgen includes a performance improvement for processing XLSX files. The loading of drawings which was optimized for XLS files is now also optimized for XLSX files (and their variants). Namely, drawings that referred to many times are loaded only once. This improves memory depending on how large are the drawings, and also speed depending on how many factored drawings are to be loaded.

Build 4.0.0.75 of xlsgen fixes a problem related to importing large CSV files, where large means wide columns.