[v2.1] Atop CHM to PDF Converter – Convert CHM file into high-quality PDF format

As ever the most common electronic document format, CHM features smooth running and convenient retrieval. While it's a pity that it does not support the popular features such as highlight, annotation and labeling. If there is no alternative PDF edition in hand, then we can use Atop CHM to PDF Converter to convert CHM format ebooks to PDF format.