Knowing this will help me confirm the safety and purpose of that specific file.
If this is a curated pack of popular items, it likely contains: imvu hits.rar
Learning how popular items are constructed—studying how meshes are rigged to the skeleton and how textures are mapped. Knowing this will help me confirm the safety
Specially designed poses for creating "hits" (popular, high-quality images) in the IMVU Photo Studio. this is the modern
For editing, this is the modern, official tool. To give you the most accurate details, could you tell me: Where did you download the file from? Are you looking to edit the items or just use them ? Is it for classic or next-gen IMVU?
Do not re-upload someone else's work as your own.