I did find a similar thread from 2010 (
http://www.wxforum.net/index.php?topic=8714.msg83098#msg83098) but there was not a follow up (solution) from poster. I am having the same problem and figured to start a new thread.
This is the situation - I did an upgrade from v13.01 to 15.0 trying to fix a temp issue. The upgrade resulted in lost communication with my ISS. So I reverted back to a saved "folder" of v13.01. The program was back to running okay - still with temp/humid issue [see below].
After trouble shooting the lost ISS communication I tried again to upgrade to v15.x and now get a message that "no software will be installed or removed". The installer then quits.
I have removed the VWS Installer folder and installer program folders. Still no joy. I know there must be some installer files "hiding" somewhere just not sure where.
System info;
Win 7, VWS 13.01, Weatherlink 6.0.3 with serial USB converter.
I do think an upgrade may fix my temp and humidity problem (they both bottom out to zero every now and then).
Any ideas would be appreciated, thanks.