You could have downloaded DualSup Free 1.4.3 from our software library for free. DualSup.exe is the most common filename for this program's installer. DualSup Free belongs to Multimedia Tools. The most popular versions of the tool 1.4 and 1.3. This software is a product of Defsoft.
From the developer:
DualSup is a unique professional Blu-Ray subtitle tool which designed to convert a single subtitle from SRT, ASS/SSA, SST, BDN to PES, SUP or BDN format and to transfer two arbitrary subtitles with different time line to a single subtitle.
For example, you can display two language subtitles like English and Chinese at the same time. Also you can show dialogue and director review subtitle simultaneously.
You may want to check out more software, such as Free Audio Converter, Free Medical Spell Checker or Free Medical Dictionary Spell Checker, which might be similar to DualSup Free.