PDF Light Viewer

I bought Pro version, my plugin was working fine, after change my site URL stoped work, already erase all site and made it again but plugin still not work.
Gives that error message:
Fatal error: Uncaught exception ‘ImagickException’ with message ‘unable to open image `/htdocs/public/wp/wp-content/uploads/pdf-light-viewer/3317/page-00001.jpg’: No such file or directory @ error/blob.c/OpenBlob/2712′ in /htdocs/public/wp/wp-content/plugins/pdf-light-viewer/controllers/PdfController.php:692 Stack trace: #0 /htdocs/public/wp/wp-content/plugins/pdf-light-viewer/controllers/PdfController.php(692): Imagick->readimage(‘/htdocs/public/…’) #1 /htdocs/public/wp/wp-content/plugins/pdf-light-viewer/controllers/PdfController.php(592): PdfLightViewer_PdfController::getFirstPageGeometry(‘300′, ’60’, ‘/htdocs/public/…’, ‘/htdocs/public/…’) #2 [internal function]: PdfLightViewer_PdfController::save_post(3317) #3 /htdocs/public/wp/wp-includes/class-wp-hook.php(288): call_user_func_array(Array, Array) #4 /htdocs/public/wp/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(”, Array) #5 /htdocs/public/wp/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #6 /htdocs/public/wp/wp-includes/post.php(3570): d in /htdocs/public/wp/wp-content/plugins/pdf-light-viewer/controllers/PdfController.php on line 692
Can you help me please? 
what have i done wrong?