@PeterJones said: I am assuming you never passed the const char configFile[] to a N++ message. I do not pass the string anywhere and it already affects the plugin acceptance. It is just declared and that is all. It might be some bug in MinGW itself but I am not able to judge. If I remove the initialization and have static const string configFile; the plugin is ok, too. In the meantime I upgraded to version 8.9.6.4 (the newest one) but it behaves the same. Is there a way how to debug what is going wrong when plugin is opened ?

@PeterJones - There was nothing unusual that I noticed about the install. Seemed just like any other update done previously. I didn’t realize the backups could be deleted, which is why I never bothered to save. Pretty stupid, I know, but I got away with it up until this point. Anyhow, sounds like my only hope is to try and use Recuva. I’ll give that a shot and cross my fingers that it can somehow be recovered. Appreciate you taking the time to help with this!