Updating to MP 1.3.30 Failures (Thumbnailhandler.dll)

When updating to MP 1.3.30 in Windows 7 the update reports failure. Looking at the output from the CMD window it looks like the file path of the directory to be copied to is corrupted ... See below.

MP 1.3.30 appears to work okay, however.

Here is the CMD window output:

Microsoft Windows NT 6.1.7601 Service Pack 1
dir: C:\Program Files (x86)\Mission Planner
file: C:\Program Files (x86)\Mission Planner\current_d1.alp.new
Move: C:\Program Files (x86)\Mission Planner\current_d1.alp.new TO C:\Program Fi
les (x86)\Mission Planner\current_d1.alp Done.
file: C:\Program Files (x86)\Mission Planner\fwversions.xml.new
Move: C:\Program Files (x86)\Mission Planner\fwversions.xml.new TO C:\Program Fi
les (x86)\Mission Planner\fwversions.xml Done.
file: C:\Program Files (x86)\Mission Planner\tlogThumbnailHandler.dll.n
ew
Move: C:\Program Files (x86)\Mission Planner\tlogThumbnailHandler.dll.new TO C:\
Program Files (x86)\Mission Planner\tlogThumbnailHandler.dllC:\Program Files (x8
6)\Mission Planner\tlogThumbnailHandler.dll.new Failed.
Move: C:\Program Files (x86)\Mission Planner\tlogThumbnailHandler.dll.new TO C:\
Program Files (x86)\Mission Planner\tlogThumbnailHandler.dllC:\Program Files (x8
6)\Mission Planner\tlogThumbnailHandler.dll.new Failed.
Move: C:\Program Files (x86)\Mission Planner\tlogThumbnailHandler.dll.new TO C:\
Program Files (x86)\Mission Planner\tlogThumbnailHandler.dllC:\Program Files (x8
6)\Mission Planner\tlogThumbnailHandler.dll.new Failed.
Move: C:\Program Files (x86)\Mission Planner\tlogThumbnailHandler.dll.new TO C:\
Program Files (x86)\Mission Planner\tlogThumbnailHandler.dllC:\Program Files (x8
6)\Mission Planner\tlogThumbnailHandler.dll.new Failed.
Move: C:\Program Files (x86)\Mission Planner\tlogThumbnailHandler.dll.new TO C:\
Program Files (x86)\Mission Planner\tlogThumbnailHandler.dllC:\Program Files (x8
6)\Mission Planner\tlogThumbnailHandler.dll.new Failed.
Move: C:\Program Files (x86)\Mission Planner\tlogThumbnailHandler.dll.new TO C:\
Program Files (x86)\Mission Planner\tlogThumbnailHandler.dllC:\Program Files (x8
6)\Mission Planner\tlogThumbnailHandler.dll.new Failed.
Move: C:\Program Files (x86)\Mission Planner\tlogThumbnailHandler.dll.new TO C:\
Program Files (x86)\Mission Planner\tlogThumbnailHandler.dllC:\Program Files (x8
6)\Mission Planner\tlogThumbnailHandler.dll.new Failed.
Move: C:\Program Files (x86)\Mission Planner\tlogThumbnailHandler.dll.new TO C:\
Program Files (x86)\Mission Planner\tlogThumbnailHandler.dllC:\Program Files (x8
6)\Mission Planner\tlogThumbnailHandler.dll.new Failed.
Move: C:\Program Files (x86)\Mission Planner\tlogThumbnailHandler.dll.new TO C:\
Program Files (x86)\Mission Planner\tlogThumbnailHandler.dllC:\Program Files (x8
6)\Mission Planner\tlogThumbnailHandler.dll.new Failed.
Move: C:\Program Files (x86)\Mission Planner\tlogThumbnailHandler.dll.new TO C:\
Program Files (x86)\Mission Planner\tlogThumbnailHandler.dllC:\Program Files (x8
6)\Mission Planner\tlogThumbnailHandler.dll.new Failed.
Update failed, please try it later.
Press any key to continue.

Start by reproducing the Mission Planner 1.3.30 update on Windows 7 and inspect the CMD output for the tlogThumbnailHandler.dll move. Trace the updater entry point that constructs the destination path; done means the update completes without the duplicated path or repeated move failures.

Written by the indexing model from the issue text.