Onkel Hatti wrote:
In the gimp\bin directory, there should be a lot of .dll files, including libgimpui-2.0-0.dll.
Starting gimp is no problem, because windows can find all the needed dll files in the gimp\bin directory.
But on the first start, gimp checks all the plugins in the gimp\lib\gimp\2.0\plug-ins directory. Some of them need functions from the gimp-libraries (as libgimpui-2.0-0.dll), they were compiled with, too. But now, windows cannot find them, because it doesn't look in the gimp/bin-directory, it looks in the plug-ins directory instead.
So the solution is:
Put the dll - files somewhere in the system path. (recommended)
Add the gimp\bin directory to the system path (strongly recommended)
Copy all dll - files from the gimp\bin directory to the gimp\lib\gimp\2.0\plug-ins directory (not recommended)
Be aware: If you have more than one plug-ins directory, they could need the dll - files, too, so the third method must be repeated for every plug-ins directory. As I said: not recommended
This is another VERY good reason to use Parthas version of Gimp-2.8. His installer auto appends the path variable value.