Knowing which version you are on helps identify why certain DLC (like the IT Expansion) might be missing. Nintendo Switch NSP Combination Install Tutorial
: DLC often requires the latest base game update to function. For example, the IT Expansion content was added in Update 1.4.0 , and without this update, associated DLC files may not load. Advanced Fixes for Custom Firmware and Emulation pc building simulator switch nsp dlc update fix
A common issue with PC Building Simulator is region mismatch. If your base NSP is the US version (USA) but your DLC or Update NSP is the European version (EU), they will not merge. Knowing which version you are on helps identify
If the game runs fine for 30 minutes then crashes, you have the memory leak bug present in updates post-v1.1.6. Downgrade to Update v1.1.6. If you need newer DLC, you cannot downgrade. Instead, after every 3 completed jobs, save manually (X button) and close the software completely. Re-launch to reset the memory pool. Advanced Fixes for Custom Firmware and Emulation A
If you cannot find the standalone DLC NSPs, use a text editor on your SD card:
If the game launches but the new parts or workshops are missing: Verify your matches across all files.