I came across an edge case recently so I thought I would document it here in case anyone else falls into the same trap.

The problem is largely due to the currently unsupported Magix releases of Vegas. The new release, which supports Vegas V14 and V15 is close but not quite ready for release. In the interim I've been suggesting to install trial versions for older releases of Vegas, which can be downloaded from this forum post . You can install multiple different trial versions of Vegas on the same computer.

The next version of TandemVids allows you to switch versions easily by holding the shift key when starting.

The current version of TandemVids uses the latest version of Vegas by default. TandemVids won’t start if the Vegas trial has expired. If TandemVids won’t start, you can’t change the version. Catch 22.

To rectify this issue:

1. Open “regedit.exe” by typing the name into the search box in Windows.
2. Navigate to “Computer\HKEY_CURRENT_USER\Software\Swoopware\TandemVids”
3. Modify the “SonyVegasAppPath” value and set it to one of the default locations listed below for your version of Vegas.

C:\Program Files\Sony\Vegas Pro 9.0\vegas90.exe
C:\Program Files\Sony\Vegas Pro 10.0\vegas100.exe
C:\Program Files\Sony\Vegas Pro 11.0\vegas110.exe
C:\Program Files\Sony\Vegas Pro 12.0\vegas120.exe
C:\Program Files\Sony\Vegas Pro 13.0\vegas130.exe

If the desired version of Vegas is the latest version you have installed, you can simply delete the value and TandemVids will find the newest version automatically.

Mick