"The editing window is rather dull and unattractive." - Hey, that is perhaps the biggest compliment you could make to us.
We invested years of smoothing out any edges from the UI to make appear reduced. However, you should be able to accomplish any task you want and lack of user interface bling minimizes computer resource requirements. Please take PhraseExpress as a work tool. In most cases,you rarely need the main program window at all and the actual phrase selection window can be customized in great detail (colors, fonts, size).
Simply the best Text Expander
This is a great little program; yes Word has Autotext, but this Phrase Express does the same thing in any program, in any browser window!
Autotext Utility, AutoCorrect transfer from Word, Clipboard Manager, text prediction and autocompletion. Free for personal use.