Hi guys, I'm Matt, and I'm working on this issue. In addition to Jogu's comments above, I thought I'd add that the problem appears to be related to the presence of special characters (spaces, punctuation characters etc), in filenames.
As Jogu mentioned, a new build will be available soon with a fix, but in the meantime, you can workaround this problem by renaming your file before deleting it to remove any spaces or punctuation (the . character should be fine).
Sorry for the inconvenience caused.