I have purchased Grim Dawn 1.1.9.5 GOG a year ago, which I have installed on an offline computer.

A week ago, I have downloaded the GOG patches 1.1.9.6 and 1.1.9.7 which I have installed on this computer.

The game now displays 1.1.9.7 on the bottom right corner on the main screen, but still shows all the stats from the 1.1.9.5 version. I have double-checked several times, and all the numbers that were supposed to change with the update have not changed, and there was no problem during the installation of the patches, and the game does display 1.1.9.7 as game version.

I don't understand.

Do I have to try to repatch the game or something?
I have tried the repair.exe application, but it crashes as soon as it starts.

If it's crashing when you try and run repair then I think you'll need to uninstall and then reinstall the game again.

I have downloaded the full game version 1.1.9.7 and installed it over the current version, and it worked: I now have Grim Dawn (with the two expansions) showing the version 1.1.9.7 on the main screen with the in-game statistics related with the 1.1.9.7 version.

There might be something wrong with the patches that GoG may want to fix, and the updated full install is this fix as far as I am concerned.

In which drive and folder have you installed GD in?