Since the  it is not possible to install the license file in JChem for Word and Powerpoint by browsing the license file manually in the License Manager dialog if you open it from the "No license file found ..." warning dialog:

 Currently in these cases the filesystem of the computer is not accessible from the user interface:

As a workaround please copy your license file, which should be named exactly as license.cxl to the following folder:

C:\Users\Current user\chemaxon

Current User means the name of the user who is currently logged in.