This is just too bizarre. I often use the ise alias in the Windows PowerShell console to launch the ISE. Today, literally 23 minutes before this post, I entered a path after the alias for the first time EVER (and of course, it worked).

Get-History | Where {$PSItem.CommandLine -like 'ise *'} | select ID,CommandLine,StartExecutionTime,EndExecutionTime

Id CommandLine StartExecutionTime EndExecutionTime
-- ----------- ------------------ ----------------
8 ise C:\Users\tommymay\Desk... 1/2/2015 12:36:36 PM 1/2/2015 12:36:37 PM