Just updated to LR 5.5 and when using HDR Effects Pro 2 I select the files for output to HDR Effects, they are sent to the program, I make what changes I need and save the file back to LR. Noticed no LR export file seems to be there to send the output from HDR back to. Since the update I am getting this message but not every time. LR pops up this warning and all changes are lost "unable to export, an internal error occurred: addphoto: no file at path". The frustration is that it is intermittent and like most errors has no explanation. LR 5.4 had no issue with this. Using Win 7 64 bit. Any help would be appreciated.