I'm sorry, but I'm having some problems trying to understand your written English.
Our products works just fine, I don't understand what do you mean with "reinstalled dices the slightest error.", which error ? An error you think you made ? As I've said, you have to always use the CURRENT version, that's it.
What is the files FSX on whom during the installation a line of program Fs Dreamteam vinet be added?
Again, I'm not sure what you are asking for. What's "FSDreamteam vinet" means ? There's no needs whatsoever to "clean" of "fix" your FSX, since from YOUR description of the problem, everything is WORKING, since you SEE the Addon Manager menu, and you SEE the buildings, but they disappear after the Trial time. Sorry, but this just can't happen, and it won't be fixed anyway by reinstalling FSX, since FSX reinstall doesn't have anything to do with this.
There is certainly a file where 2 let us let us overturn are present and which enters interference
As I've said, there's no "interference", but again I really can't fully understand what you are saying.
A file that MIGHT create a problem, is a older version of the Esellerateengine.dll that has been installed by ANOTHER PRODUCT.
Check if you have that file in the C:\Windows folder and, if yes, remove it.
Every time dau I have a problem with your products you bring no solution. It is necessary to redo FSX from A to Z
Wrong, I've given you two different solution in the two replies I made before, and a 3rd solution now so, please, stop saying we "don't give solutions", which is wrong.