I use registry keys to found DCS path, it can failed if you have moved manually DCS, or install DCS from another user.
If it failed, you should have to install manually by moving all files in your DCS/bin folder
The files are listed here, if you want to check:
https://www.lotatc.com/projects/lotatc/wiki/Server_Installation_guide
Check the DCS/Logs/dcs.log file (you can send it to me). You should have reference to LotAtc.
You have not to be sorry, it is my choice to ask some money on that, spend a hudge of hours on that since 7 years now (yes begin on LO:FC1), rent a server for hosting/test and development tools that have all a cost... LotAtc is working on a great majority of systems in less than 5 min (LotAtc is used by lot of users), but sometimes it can have some some errors or bad configuration that cause troubles. The fact that it is not installed at right place can explain yours.
Just send me the dcs.log and I could certainly give you some help... LotAtc community could says you that I provide a great support of my software (that also a reason for its price).