Unlike Adobe Acrobat, PDF-XChange is a one-time purchase rather than a high-cost monthly subscription.

PDF Xchange Viewer is known for its high-quality rendering of PDF files, including support for complex layouts, fonts, and graphics. The software is also relatively lightweight and performs well on lower-end hardware.

The latest (and final) stable version is v2.5.322.10 , released in December 2018. There is no official "Version 25"; the "25" in your query likely refers to the 2.5 branch.