Dmitry,
I am unable to figure out how to attach a screen shot of the error message. I’ve tried to attach both a .gif and a .jpg version, but it just doesn't work. File size is not the issue. The files are only 8 kB or 30 kB. This is my first attempt to use a forum. The error message box is 3.8 cm wide and 4.4 cm high. There is a light blue border surrounding a white and gray interior. In the upper right of the border there is a small X for exiting. To the left of the x are the words "File not found". On the white part of the interior is a large x in a red circle. In the gray part of the interior at bottom right is a rectangular "OK" button. The error message provides no other information. Clicking either the little x in the upper right or the “OK” button makes the error message disappear. Clicking elsewhere in the error message box has no effect. When the error message disappears, there is no remaining indication of the attempt to install the AVI trimmer.
Sorry.
Bob S