Upgrade of Fixed Assets Add-On 
If you were using SAP Business One 8.82 or lower versions with the Fixed Assets add-on installed, the upgrade process has the following results:
The add-on is not available.
No data in the add-on is upgraded. Instead, all data in the add-on is stored in the database after upgrade.
Migration of Fixed Assets Data
In order to make the data available in SAP Business One 9.0, you must use the fixed assets data migration wizard.
With the wizard, you can only migrate the asset values at the beginning of a fiscal year from the add-on to SAP Business One. No asset transactions can be migrated.
Example
You have been using SAP Business One 8.82 with the Fixed Assets add-on since 2010. In March 2013, you upgrade to SAP Business One 9.0.
After the upgrade, you migrate the data from the add-on using the fixed assets data migration wizard. As a result, all the asset master data with their accumulated values as of January 1st, 2013, are migrated. Any depreciations or transactions posted after January 1st, 2013 are not migrated.
Therefore, to make sure all fixed asset-related data are correctly migrated, we recommend that you upgrade when you close a fiscal year and are ready to open a new fiscal year.
In case the upgrade must be executed in the middle of a fiscal year, you must do the following in the add-on before the upgrade to ensure the data migration afterwards achieves the expected results:
If there are asset depreciations in the fiscal year, cancel the corresponding journal entries.
After the upgrade, you must carry out these depreciations again.
If there are asset transactions, such as capitalization and retirement, in the fiscal year, cancel the transactions and their corresponding journal entries.
After the upgrade, you must create these transactions again.