Many Thanks ... This has frustrated me for a long time ...

Worked perfectly . Cheers

I too wrestled with this issue for quite awhile. These simple instructions resolved the issue. GIMP now starts in a flash compared to the hangups I was experiencing with font indexing on every start.

My (wonderful) experience, just in case somebody might find it useful. (Not sure if this is going to work for everyone)

GIMP used to take up to a whole minute indexing fonts every time it started up on my Windows 10 laptop.

Somewhere I read the suggestion to find the .font.cache-1 file in users/myaccount and delete everything that was written in it. But there was no such file in such location.

So I decided to create the file... and it worked!! GIMP starts as fast now as it does on Linux!!

Go to C:\Users\youraccount ("youraccount" means "the account with your name or whatever name you gave to the account you normally use)

Right click on any empty space withing the window.

Select New > Text document

Name it .font.cache-1 (starting with a dot)

Delete the .txt extension.

Restart the computer. Start GIMP.

Let's hope for the miracle to happen! I can't guarantee this will work, but... who knows! Good luck! ^^