Is it a known issue? If yes, I apologize for this post.
After I installed Windows Enterprise 90 days Evaluation version, build 9200, I re-installed Logos 4 to my main User Account. Then tried to install Logos 5 over it but it started to install to a new Logos 5 folder under the ..AppData/Local (leaving Logos 4 folder untouched).
I uninstalled Logos 4 and installed a clean Logos 5 new installation. It went w/o problems.
Then I created a new User Account and tried to install Logos 4 there. I noticed in the Programs under the Control Panels that Logos 5 Prerequisites are visible and Logos 4 was not installing its own Prerequisites. Logos 4 would not install properly.
When I deleted Logos 5 Prerequisites from the "Logos 4" User Account and installed Logos 4 Prerequisites, Logos 4 worked well, but Logos 5 in my main User Account haven't (obviously). And vice versa.
My Conclusion: Logos installs Prerequisites for all users and it allows to use more installations of the same version of Logos in a different User Accounts, but not a different versions of Logos. Am I right? Is it a desired behavior?