Plugins stopped working after upgrading to 2.10.34 in Windows

[HueyIroquois]

I wrote some plugins which get executed via the Popen() function. They were working just fine, but after upgrading to version 2.10.34, all they do is generate error messages about not being able to find certain msys dll's. All 3 dll's exist in both the "GIMP 2/bin" and the appropriate msys folder. The plugins still work when I execute them manually from the Windows Command Prompt, so what do I have to do to get them to work again with GIMP?