If you recently got a new computer running Windows8, like me, you may have trouble installing older versions of Timeslips.  Here is a fix that worked for me.

My original installation CD was for Timeslips 2010.  When I first attempted to run the installation, I got an error message saying the software isn't compatible with Windows 8.  It turns out the software itself is compatible, but not the installation apps.  Here's what I did:

First, I copied the entire CD onto my Desktop.

I then opened the folder I just created on my Desktop, which is called TIMESLIPS 2010 (D).  I used the Search box in the top right corner to find all files in this folder and its subfolders containing "exe" (so ended up with a list of all the application files plus a few non-apps).

The trick is, you have to change the "compatibility" of each and every application file.  There were about 20 of them for me, so it took a few minutes but well worth it.

To change the compatibility of a file, you right click the file and select Properties.  Under Properties, select the Compatibility tab.  There will be a section called "Compatibility mode" and a box to check that says "Run this program in compatibility mode for:"  After you check that box, you can use the pull-down menu to select an operating system.  The default, which worked for me, was Windows XP (Service Pack 3).

After you have done this for every application file, double-click the "Setup" file in the main folder (not any of the numerous Setup files in the various subfolders).  This will open the installation box, and you can take it from there.

In my case, after I installed Timeslips 2010, I was able to install the 2013 upgrade with no problem.  Make sure you have your 25-digit configuration code(s) and serial numbers, etc.

Good luck and you're welcome!