: Ensure your base game is exactly 1.4.4.9. If your version is older (like 1.4.4.1), the 1.4.4.9 build of TML will likely crash on startup.
: Modern tModLoader uses the Steam Workshop to download mods. This means even non-Steam users typically need Steam installed on their PC—though not necessarily a logged-in account—to facilitate mod downloads through the in-game browser.
: Downloading cracked TML installers or "fixes" from unofficial forums poses a high risk of malware or bundled adware. Verdict
: It is normal for the installation to appear frozen during the initial setup; wait at least 5–10 minutes before restarting.