I was looking at it but I don’t know what it does, and is it a program I could download. also if it is a downloadable program where can I download it at?
To use it, make sure that oto.ini, doub_alias.ini, and doub_alias.exe are all in the same folder. Drag and drop the oto.ini file onto doub_alias.exe. This will create duplicate lines in the OTO with other aliases, according to what's specified in doub_alias.ini. For example, you may want to duplicate a line aliased as "か" so that it also has the alias of "ka". This saves you the trouble of duplicating lines one by one.