Dear Dodo,
The Advanced Ordernumber plugin has gone a long way since the earlier version...
To set a starting number, there are now two easy and straightforward ways:
1. If you have already done a test order after configuring the number format, the counter is already created in the database. You can then use the table of existing counters in the plugin configuration to modify the existing counter:
open-tools.net/documentation/ordernumber...nging_counter_values
2. If you do not yet have any test order in your system (and thus the counter has not been created), you can include the start value directly in the format, like "[year]/[#:3456]" to start from 3457 (the value given in [#:....] indicates the value of the PREVIOUS invoice/order). Please notice, though, that this will start from 3457 with the first order this year, but it will also start with 3457 in the year 2016.
Best regards,
Reinhold