If you are experiencing issues when attempting to open your FileOpen protected courseware in AdobeAcrobat, we suggest you attempt to install the latest plugins available from FileOpen at: https://plugin.fileopen.com/
Additional information about what is new in the latest Windows plugin can be found here: https://www.fileopen.com/blog/fileopen-client-build-b1014-released
Additional information about what is new in the latest Mac plugin can be found here: https://www.fileopen.com/blog/fileopen-client-for-macintosh-b988-released