diff -up gimp-2.10.18/etc/gimprc.in.no-phone-home-default gimp-2.10.18/etc/gimprc.in

--- gimp-2.10.18/etc/gimprc.in.no-phone-home-default	2020-02-23 21:15:47.217777581 +0100

+++ gimp-2.10.18/etc/gimprc.in	2020-02-23 21:22:42.416162110 +0100

@@ -393,7 +393,7 @@

 # Check for availability of GIMP updates through background internet queries.

 #  Possible values are yes and no.

 # 

-# (check-updates yes)

+(check-updates no)

 # Timestamp of the last update check.  (null)

 #