Another change made to the interface of Iron Speed Designer V8.0 is the re-location of the Query Wizard. This wizard is used to alter the FROM, WHERE and ORDER BY clauses of table controls.
Previously, you could access this wizard by right-clicking anywhere within the table control, selecting Query, followed by the table control you wish to edit, then the option you want, as shown below:

In ISD V8.0, you need to navigate to the level containing the table control, select it, then click the three dots that appear when you click the SQL query property in the Properties panel, as shown below:

You can also open this wizard by selecting the appropriate query from Iron Speed Designer's new Data Sources tab, then clicking Edit, as shown below:

This will then open the following Query Wizard:

Hope this helps!