Same issue here... I am using Win XP and it has been a rock on v70. I wanted to get my TTD on an updated OS and we purchased a little netbook to do this; however the audio quality is poor and I am having trouble with tone detection. I will have to dig into this again.
Regardless, my situation is the same without Chrome installed. It appears nothing is happening, but you can access the web interface; however it doesn't display right in IE. Attempting to click on the EXE again appears to open multiple instances as there are more instances in Taskman and also the log files state the port is already in use and that it is trying another port. Seems concerning to have multiple instances at once, especially when you cannot see it running, are they all doing redundant work and going to send multiple copies of the same tones?
For those still in the XP ages, Chrome 49 is the most recent version that will support XP. Using that the UI opened for me and when I browsed via the web things appeared to work. Going to see if I can get this up and running on this system for now.
https://www.slimjet.com/chrome/download-chrome.php?file=win/chrome32_49.0.2623.75.exe
*** UPDATE ***
At first glance it looked like Chrome 49 was displaying the new UI correctly; however it isn't functional. You cannot select audio input/output, click any of the buttons, etc. I will have to get a computer with an updated OS to proceed it appears.