To silently install File Viewer Plus from the command line with default options, use the following commands. You should run these commands with admin privilege or Windows will block the install with a UAC permissions prompt. For advanced installation, see Installer Options for arguments that can be supplied to the installers.
fvp_setup_126.96.36.199ent.exe /VERYSILENT /SUPPRESSMSGBOXES /NORESTART
msiexec.exe /i fvp_setup_188.8.131.52ent.msi /quiet
To activate the license, use the following commands, where "C:\path\to\fvp4.exe" is the post-install path to the main program executable ("C:\Program Files (x86)\File Viewer Plus 4\fvp4.exe" by default) and XXXXX-XXXXX-XXXXX-XXXXX-XXXXX is your activation key.
For online activation keys:
"C:\path\to\fvp4.exe" /activate XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
For offline activation keys (requires the file path to your enterprise license file as well):
"C:\path\to\fvp4.exe" /activate-offline XXXXX-XXXXX-XXXXX-XXXXX-XXXXX "C:\path\to\fvp4-enterprise-lic.dat"
When activation is complete, a license file is saved to "%PUBLIC%\File Viewer Plus\fvp4.lic", which typically resolves to C:\Users\Public\File Viewer Plus\fvp4.lic.