A license synchronization is required before the update of PVsyst to v6.7.4

[Nils Lang]

In case you have already updated to v6.7.4 and you observe a license error (bad host id), here is a procedure to recover from this error:

1. Install PVsyst v6.7.3 from https://www.pvsyst.com/previous-versions

2. Start PVsyst v6.7.3 and synchronize your license using menu and button

3. Install PVsyst v6.7.4

4. Start PVsyst v6.7.4 and synchronize your license again.