We know that the current update procedure is confusing and overcomplicated. We'll improve it.

For now, if for any reason you can not install an update pls provide at least the following info in this thread:

1. Full Base Pack .exe file name you have installed OK.   
2. Full Expansion(s) .exe file name(s) you have installed OK (if any).   
3. Full Expansion .exe file name you have ISSUES with.
4. Full URL(s) of the pop-up(s) you get when you run a sim.
5. Explanations why you can not follow the instructions listed on the pop-up(s) web page(s).

Thanks.