Steven, put it down to my incompetence....don't know if this helps; it's from my last attempt to drag files into the database.
MusicBee v3.1.6445.32424 (Win10.0), 27 Aug 2017 10:39:
#=qB35qpwGlmqo2z8nMqj9Tjw==+#=q5V646T3cyOkEEiUA5OEjwQ==+#=qJcmaEn2BDUP16bvZTKWlNQr9re9joeODeHHADmyKTTM=: The process cannot access the file because it is being used by another process. [C:\Users\adria\Downloads\Jonny Lang - Signs (2017) (Mp3 320kbps) [Hunter] SSEC\Jonny Lang - Signs (2017)\01. Make It Move.mp3]
at #=qB35qpwGlmqo2z8nMqj9Tjw==.#=q5V646T3cyOkEEiUA5OEjwQ==.#=qem208lvO8r83t3UGt71ceQ==.#=qzzksfVdXhTJRBrSc29K16w==(#=q9FQ1HEHTMkTaU5nfqZ_MpA== #=qArLUv5NusGPtB88YQxDcnw==, #=q9FQ1HEHTMkTaU5nfqZ_MpA== #=qMArjwR8Z51ZY77XRfbRw1g==, Boolean #=q3kZC11aWuO0gZfzOxB_Vsg==)
at #=q4XE7Gj9WjAnoOnjFp2R9uubD9ATKvDHfcBhFfBmZsnU=.#=qzDKtOpct04VNZQ7gKjtNeA==(#=q7ZBnHH6WU9ioDSgUOdR0q5en7jMd3AOSl6_kmPHGDMY= #=qJ9rVN1F4hCqYua$SD$Ky3g==, #=q9FQ1HEHTMkTaU5nfqZ_MpA== #=qU6800oNdDTkuRjxarRqvHQ==)
at MusicBee.Media.StorageManager.#=qh1t8bt4xlLMMJmtNljn$WA==(#=q7ZBnHH6WU9ioDSgUOdR0q5en7jMd3AOSl6_kmPHGDMY= #=qZ8n1KexvyfosRsjX9AoFww==, #=q9FQ1HEHTMkTaU5nfqZ_MpA== #=qfvzfvFFbUYDkgIwo0ki0_g==)
at #=qSNt55aBMG7rZOYnCQECPmLaP5t$e9A3nAxr0KNKcC$s=.#=q4HFmvz$oub9U00KMORzMvw==(#=q7ZBnHH6WU9ioDSgUOdR0q5en7jMd3AOSl6_kmPHGDMY= #=qgaA6XOtG9sS$damrA8eZxw==, #=q9FQ1HEHTMkTaU5nfqZ_MpA== #=qGdeBCnl63OiTeIV$$IM8rw==, List`1 #=qeo71n5ngqYDA02WT7AoTlg==, #=qKREC79j0AOck5$H4hemCJsAFRS4V5xq$R_VNQo2VOMo= #=q3IBwipzwoCKydNpB8RL74w==, #=q9FQ1HEHTMkTaU5nfqZ_MpA== #=qWHJ4l_4UNeIzXOOlv$jPQSgZDrois3ZCCFKb_Gqn$fw=)
at #=qSNt55aBMG7rZOYnCQECPmLaP5t$e9A3nAxr0KNKcC$s=.#=qef9G4HMMn1TKEy1JMLT8hA==(#=qKREC79j0AOck5$H4hemCJsAFRS4V5xq$R_VNQo2VOMo= #=qUTfvFJCJbgFU9u5kCmnK0Q==, #=q7ZBnHH6WU9ioDSgUOdR0q5en7jMd3AOSl6_kmPHGDMY= #=qNXKBdl2HeS_VC_hpi2EH5g==, List`1 #=q7rGDww_PbUz9F78mzAz49w==, Boolean #=qAkoHmvFlX$PvFDTqNIIhJg==, #=q9FQ1HEHTMkTaU5nfqZ_MpA== #=q7ElaMI16Jdt4E49k1WvQQbdr3C0aYBE8r4EQkmkuy1o=)
at MusicBee.MusicBeeMain.#=qhxE9sQ6FiAOlYw7Q_YBO7g==(Object #=qNEp6dFmv6$B3Bm9XFzx7Hw==)