To get rid of the cmdline popup in windows, you could also opt for this script and name it RUN_TIC80.vbs (again, be aware of the space before the final dot on commandline. Also, place this script in the same dir as tic80.exe):
Set oShell = CreateObject ("Wscript.Shell")
strArgs = "cmd /c tic80 ."
oShell.Run strArgs, 0, false
Nevermind the param error popup that follows when starting up. The dev already fixed that issue and will be solved in the 0.70.+ release of Tic80.