There is (or was) a patch from 2015 -- not exactly a new patch. Is that the one you're looking for? Any recent download should already be patched. If you downloaded the game more than 2 years ago, try downloading again.
Here is the announcement of the version 2.0 patch, dated January 2015.
http://www.postudios.com/blog/forum/index.php?topic=14298.0If you downloaded the game later than that, and still have the issue, then it is already patched and the version 2.0 patch would not fix your problems even if it were still available.
I logged into GOG to check version, and their current version is 2.2.0.9. So a version 2.0 patch would be a downgrade. It's probably the same if you download from Phoenix, but you can check if your installer includes the version number.
Here is the GOG changelog:
Patch gog-9 (16th May 2016)
Linux addition
Optimization of scene loads
French and Polish languages officially added
Fixed broken achievements Charming Young Man and Comic Relief (*Steam version only)
Added a final score display at end of game
Adjusted maze to not allow water to rise and drown characters before wheel puzzle
Adjusted drowning death in maze to always retry after wheel puzzle
Plus other various bug fixes and adjustments
Patch gog-8 (14 December 2015)
Updated to Unity 4
Various game optimizations, which translates to faster scene transitions, smoother animations, and overall more efficient memory usage.
Fixed bug where UI bars were showing in video cutscenes.
Fixed various camera switch crash bugs from last version.