@MikePryadko you can help by:

1. upgrade to the current version built from source (not that I think its any better, but its a prerequisite for the next step, and reporting problems on very old versions on closed issues is rarely effective)

2. write the C code to make JSON a full filetype so you can add the JSON highlighting lexer from Scintilla (assuming that does what you want). Currently JSON uses Javascript which uses the C highlighter. Pull requests are welcome.