Upgrade/re-installing FineReader Server with versions older than 188.8.131.520 (x64) is not working in some cases. No errors apt the installation logs and .MSI logs
In all old versions (e.g. FRS14_R3_U4_1340.25_184.108.40.2060_x64) you can install the COM API without the other components (like the FineReader Server itself or the remote console).
In the current setup (FRS14_R3_U5_1340.26_220.127.116.119_x64), the COM API can only be installed in conjunction with the other components.