Same issue, may just try another DAW...
Unhandled Promise Rejection
Error: spawn EBUSY
at t.<computed> (electron/js2c/asar_bundle.js:5:2208)
at C:/Users/mrsir/AppData/Local/Programs/bandlab-assistant/resources/app.asar/index-win.js:403:7
at new Promise (<anonymous>)
at install (C:/Users/mrsir/AppData/Local/Programs/bandlab-assistant/resources/app.asar/index-win.js:402:12)
at queueInstallers (C:/Users/mrsir/AppData/Local/Programs/bandlab-assistant/resources/app.asar/index-win.js:720:7)
at C:/Users/mrsir/AppData/Local/Programs/bandlab-assistant/resources/app.asar/index-win.js:794:13
at runMicrotasks (<anonymous>)