If you often use a regular expression, you can save it in favorites. Search pattern, replacement, and search modes will be saved.
Press the button with downward arrow (near Search for and Replace with fields) and select Add to favorites.
Now type the name of the favorite, under which it will appear in the menu. You can also correct the pattern or the modes here.
Your search parameters are now saved. You can go back to them by selecting the item from menu:
The Manage favorites dialog allows you to edit the saved parameters or to delete them.