16 bit support

[Ofnuts]

OK, opens as 16-bit for me. My suspicion: you once played with the file-tiff plugin, so you now have the old plugin somewhere, overriding the standard one.

Locate your Gimp profile (possibly in C:\Users\{your_id}\AppData\Roaming\GIMP\2.10 otherwise see the link above for ways to locate it) open the pluginrc file with a text editor and search for file-tiff-load. It should look like:

Code:

(plug-in-def "${gimp_plug_in_dir}\\plug-ins\\file-tiff-load.exe" 1494435050

The important part is the ${gimp_plug_in_dir} which means that the file is loaded from Gimp's own plugin directory. It it loaded from somewhere else (typically, your the  plug-ins subdirectory of your Gimp profile), then locate that file, erase/move it, and restart Gimp. You can also do the same for file-tiff-save. You don't need to edit the pluginrc file itself.

[einstein]

The only thing in "pluginrc" file that differs from what you typed is the following numerical value - mine is smaller. Starts from 144 instead of 149. I don't know what it's related to and whether it makes any difference.

[Ofnuts]

Well, that's a good indication... This number is the date of the executable, expressed in seconds since 1970-01-01 00:00:00. Your executable has a time stamp around  November 22, 2015... My timestamp is May 10, 2017, much more compatible with a recent Gimp version. Two things to do:

* Find that directory (C:\Program Files\GIMP 2\lib\gimp\2.0\plug-ins, likely) and check the file dates. In mine no file is older than May 10, 2017. My file-tiff-load.exe is 67,328 bytes.
* If there are too many older files, uninstall Gimp, erase C:\Program Files\GIMP 2\ if it remains (any plugins left?) and reinstall. and check the timestamps again....

[einstein]

Yeah, this worked!

You were right, tis file was oldish (2015) and also had smaller size. I completely removed GIMP, deleted remaining folders and installed again. Now everything goes smooth. Thank you for sharing your wisdom!

[Ofnuts]

Good