16.6.3 (2026-04-16)
	- Fix potential security vulnerability issues.

16.6.2 (2026-03-08)
	- Add K_USRREG_ALLOWED_GROUPS configuration entry to set the allowed registration groups.
	- Sanitize fields and additional checks.
	
16.6.1 (2026-03-04)
	- Update TCPDF.
	- Sanitize XML fields.

16.6.0 (2026-03-01)
	- Update Session handlers (requires PHP 7+).
	- Tydy up some code.
	
16.5.0 (2025-06-13)
	- This version includes security fixes, please update ASAP.
	- Please update the code in your shared/config/tce_config.php file with the latest one.
	- The tcecode parser was updated to sanitize input and avoid XSS.

16.3.7 (2025-01-26)
	- Updated TCPDF.
	
16.3.6 (2024-12-24)
	- Updated TCPDF.

16.3.5 (2024-12-13)
	- Replace utf8_encode() with mb_convert_encoding().

16.3.4 (2024-12-13)
	- Patched security issues.
	- Updated TCPDF.

16.3.1 (2024-03-24)
	- Updated documentation and licensing information.
	- Update TCPDF
	
16.2.0 (2024-03-18)
	- Update TCPDF

16.1.0 (2023-11-30)
	- Format code.
	- Requires PHP 8.0+