There are two version types to suite your particular need, the most important differences between both versions are listed here:

Regular Expressions	Regular Expressions - are a widely-used method of specifying patterns of text to search for. If you are familiar with regular expressions, you will appreciate you can now use their full power from within GridinSoft Notepad. You can apply them to the current selection, the current file or all open files, just like doing a search/replace with ordinary text.You can use regular expression engine only in Professional version.
JavaScript and VBScript engine	Professional version of GridinSoft Notepad comes with a JavaScript and VBScript engine where you can run scripts. This allows for automation of routine actions such as creating backup copies, restoring, compiling etc. This feature is unavailable in the Home version.
Code Completion	Code Completion - that means the editor will try to guess the text as it is being typed.You can use code completion only in Professional version.