you are tiring to use the MICROSOFT .exe in ubuntu
you DO NOT !!!!( might in wine, but why would one want to)
install/use the linux program!!!
also the program " gimpshop" is VERY old and is using a very od version of gimp
it is using the very old 2.2 code
Gimp is currently version 2.6.13 ( 2.6 VS. 2.2 )
it is about 5 years out of date .
just install the CURRENT version of " The Gimp"
for Ubuntu run this
apt-get install gimp
but it should have been installed by default
never heard of gimpshop before but what happens when you type in gimpshop in the terminal ?
it is a VERY old hack to get gimp to look like and behave like Photoshop on MS Windows .
and thought long dead . Now there is talk of Gimp 3.0 to have only one window( the Adobe way) and there are Dev previews of that