You can type in Blender.* which will match anything that starts with the word 'Blender'. If you have two blender files you want to switch between, you can do something like Blender.*nameOfFirstFile.* and Blender.*nameOfSecondFile.*. Basically the . means 'match any character' and the * means 'match any number of times'. If you do a web search on regular expressions, you can get an even more options for using regular expressions.