Hi hilj,
Your problem is not entirely clear to us, could you please describe it detail. What exactly occurs?
1. Judging by the screenshot https://www.dropbox.com/s/hg725av2dba2ult/Screenshot%202015-02-17%2014.33.02.png?dl=0, we see that the plugin is activated and working, since there is a ‘Link to’ field in the ATTACHMENT DISPLAY SETTINGS.
2. In case you have problems accessing the Plugin settings page, we kindly ask you to specify, are you using some plugin that allows managing permissions/user roles? If yes, please try deactivating this plugin and accessing the plugin settings page again. In case the problem remains, please try deactivating all plugins except Re-attacher, and also try accessing the Plugin settings page. If you can do so successfully, please activate the plugins one-by-one, meanwhile checking after which plugin activation the problem with accessing Plugin settings page appears again.
3. Possibly, you have clicked “Select Files” button twice, and that is why 2 windows for selecting files to be uploaded appeared. The case is, our plugin does not impact the functionality that allows opening windows for uploading files.
Regards,
BestWebSoft Support Team