2 Rob: I responded to both of you. Both the solutions will work for GMail.
2 Serg: “Can parcel that created with Silver Key have been opened by other “FIPS 140-2 compliance” software?” – No, FIPS 140-2 does not demand compatibility, it is about security level.
2 Peter W: Please write to support email@example.com and please add more details. Specifically “did not install” – what happened and was there any error message?