We still in the process to improve our XLSX Library:

We recently imprroved performances of the command XLSX_Range_Values_Set dedicated to export data from LiveCode as quickly as possible.
Some example of our test:
- 11 columns * 6700 rows in less of 2 seconds
- 4 columns * 21000 rows in less of 4 seconds (style and formulae included)

We have also a new command for changing row height
XSLX_Row_Height_Set

We were late to update the documentation. This now done and available.
Some of you reported also diffculties to download the version. We reorganised the download section and deleted the old XLSX Alpha version.

Here is the link to the XLSX 1.1.2

https://www.aslugontheroad.com/download/category/11-xlsx-library-for-livecode-beta-version

Keep also in mind the thing is actually in beta version. If something goes wrong, let's explore the issue and solve it.

Thanks!