Aye, it's a PITA. I manually add any aircraft to the database whenever I spot one without full details and I have to go through this little process everytime
For me, the PITA is adding the data. So I modified the csv-to-json.py script in the tools
to take csv data and amend the database, instead of replacing the entire database (which is how the default script works). I can't access it right now, but when I get home I'll share the script.
As for a slightly faster way to clear the cache, click the three dots in the top right of Chrome, goto More tools, then Clear browsing data... That gets you to the dialog box quicker.