Here are some more commonly occurring login or license problems you might face under certain conditions and also how to deal with them. Only open up a ticket if you really READ carefully and it still didn't work.
User not found #3 at login screen
Windows:
Go to your %AppData% folder.
( Windows Key + R, type in %AppData% )
MacOS:
Go to your Application Support folder.
( Right click Finder. "Go to Folder".
Type in ~/Library/Application Support )
Find the "solyd" folder.
Find the "config" JSON file & open it up.
Search for "licenseToken".
Example:
"licenseToken": "asjdhudjbknlm9832708dhasnad"
Delete the content of licenseToken. It should look like this: