Just a note about location of downloaded DPK software

I ran into an issue about downloaded DPK software location and found a solution. Might be useful for others to avoid.

PT8.55.04 Native Windows software was downloaded on a network drive.
On Windows 2012R2 server, E:\ drive was mapped to \\<server>\PT8.55.04_WIN_DPK\.

When the DPK setup was launched from E:\setup\psft-dpk-setup.ps1, it errored out at the unzip of the first file: 
"You cannot call a method on a null-valued expression"

After adding log messages after each line around unzip-file function, the issue turned out to be PowerShell related.

PowerShell returns the path for the zip file with a trailing backslash when the file is at the root.