We do not have a download file for the latest version (11.0), but you can try downloading it from the developer's site
Download version 6.5 from Software Informer
Scanned by 7 antivirus programs on Jan 16, 2019.
The file is clean, see the report.
Version: 6.5 (x86)
File name: 91_modelsim_ae_windows.exe
Size: 572 MB