Yes, you can, easily. Two things are required.
1) You need to have the 14 days of EPG data available to use in MC.
You seem to have that already by the sound of it.
2) You need to edit the Theatre View Guide view to show more days.
The Guide view is defined in "Options > Theatre View > Items to show" and "Details". If you highlight the Guide in the Items to show list, then click on the "Set rules for file display..." on the right, you will find some custom rules. One of those rules will be something like;
[TVTime]=>#TVGuideStartDate-7d
You need to change that to;
[TVTime]=>#TVGuideStartDate-14d
That is all. The Guide will now show up to 14 days.
Have a read of this post which shows the rule setup, and has some information about the default rules:
https://yabb.jriver.com/interact/index.php/topic,112294.msg776276.html#msg776276More information here:
https://wiki.jriver.com/index.php/EPG#Advanced_Guide_Set-up