Build 3.5.0.81 of xlsgen makes it possible to use more complex passwords when securing spreadsheets.

As it turns out, with XLSX files and their variants Excel 2007 upgraded the password length limit from 15 characters to 255. Beginning with this build, xlsgen reflects that.

So for any XLS, XLA, XLT, XLM file, the password length limit is still 15 characters for encrypting or decrypting a spreadsheet.

And for any XLSX, XLSA, XLST, XLSM file, the password length limit is 255 characters.