Terminal Service Plus

I wanted to change application panel settings. I added own logo, changed color etc. It didn't satisfy me, so I reverted settings and cliked Reset Logo.
After this whenever I try to connect with windows client I receive AutoIt Error:
Line 15961 (File "C:\Program Files (x86)\TSPlus\UserDesktop\ApplicationPanel.bin"):
Error: Variable used without being declared.

I tried to restore last working settings from backup, but still no client can connect
Please help

I tried to discover where is the issue and this is the solution.
After changing panel settings, server adds/changes the line "logoffbutton=no" (or yes) in ApplicationPanel.ini. After deleting this line evertything works fine. After adding it, there is error when connecting with client.