File explorer swt? Can you recommend me one? And yes, I have tried it. Without any mods, it works fine. With any mod at all (even just one file) it ceases to load.
It sounds like the issue may be that there is some outdated mods or custom content. Sounds like you've already tested the theory. - Just in case, a how to test is in the spoiler tag.
To test this, move the mods folder to the desktop, delete the game cache and the localthumbcache.package from the Sims 4 folder to help with troubleshooting.
How to Delete Cache Files
https://sims4.crinrict.com/en/2014/09/delete-cache-files/
Launch the game again, try playing a new save to test. If it loads and plays okay, it may be that some of the mods/cc have become outdated.
To fix mods and custom content try the 50/50 method:
1. Move all the mods and cc out into a temporary folder on the desktop.
2. Move a few files back at a time. Load the game to make sure it loads and everything is good.
3. Delete the localthumbcache.package from the Sims 4 folder.
4. Repeat steps 1 - 3 till there is no more files to check.
** While your testing, don't save the game. If you find any problems, delete the mod or custom content file.
How To Find Problem Mods and CC - http://simswiki.info/wiki.php?title=Game_Help:TS4_Finding_Problem_Custom_Content
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