A number of users are reporting that updating Logos 3 breaks Logos 4 libronixdls link function in notes, on the internet and elsewhere.
As it is currently recommended that we install both Logos 3 and Logos 4, IMO you should ensure updating Logos 3 doesn't break this Logos 4 feature. The simple way of doing so would be to check the registry settings on a Logos 4 startup.