When you install Encore Pro 1.5 you are given a choice on how you want to handle access to the database, through the following screen.

The SA account is the standard account for accessing a Microsoft SQL server. In its great wisdom, Microsoft leaves the password blank, which means that there is a slight security risk that a hacker might be able to do nasty things to your computer (if you don't have a firewall). That's the way it was in Encore Pro 1.4.xx. The new version gives you a choice, and MyEncore does it's best to work with these:
1) If you leave the top choice checked (which is the default) the SA account is deleted, and the only way for us to access the database is through Microsoft's "Integrated Security", which uses your Windows log-on account. Now, the problem is that this appears only to work with accounts that have "administrator" privileges. As I said in an earlier post, I created a "limited" account, and was not able to access MyEncore. With this option checked it's no good trying to provide a password, because the SA account has been disabled. So I'm conjecturing that some folk who are not able to access MyEncore for 1.5 may be stuck in this situation. I can see no choice but to upgrade your account, or do a complete reinstall (see below) to choose another option.
2) If you check the second box, you leave the SA account intact, with a blank password. MyEncore for 1.5 should always work with this option. You need to weigh the risk of being hacked (which I believe is extremely small)
3) If you check the third option, which allows you to set your own password for the SA account, MyEncore will fail to access the database the first time you run it, but will provide you with a form where you enter the password. It will then store the SA password (encrypted) so that you should never have to enter it again.
Here's a real problem. It's no good trying to uninstall, and reinstall Encore Pro 1.5 so that you can change the database access method. The SQL accounts are stored in the database itself, which is not removed when you uninstall, and re-installing Encore Pro recognizes an intact database and does not give you the above options screen.
What I had to do was:
1) Stop the SQL server.
2) Rename the two files:
C:\program Files\Microsoft SQL Server\MSSQL\Data\EncorePro.mdf
C:\program Files\Microsoft SQL Server\MSSQL\Data\EncorePro_Log.mdf
to something else.
3) Unistall Encore Pro.
4) Reinstall Encore Pro, to get the options screen.
5) Rename the two files in step 2 back to their correct names.
Not easy - I had a couple of false starts, and my computer hung in the middle of the install once. You should know what you are doing before attempting this.
So that's the situation. I think MyEncore is doing the best it can. If you choose to use the SA SQL account (with or without a password), it should work, but if you choose to disable the SA account it looks like for now you will have to use a computer account with "administrator" privileges.
I'm looking into using the SQL utility "osql" to see if we can easily grant database acces to "limited" users.