The compatibility between version 6 and version 7 is unidirectional, files created in version 6 can be opened in version 7

However, it is important to be careful with the matching of versions as shown in the table below:

Year	Version 6	Version 7	Comments
2010	6.11	7.4
2011	6.12	7.5
2012	6.13	7.6
2013	6.14	7.7
2014	6.15	7.8
2015	6.16	7.9
2016	6.17	7.10
2017	6.18	7.11	Driverless dongles (yellow dongles) supported
2018	6.19	7.12
2019	6.20	7.13
2020	6.21	7.14
2021	6.22	7.15

For example, a .top file created in version 6.21 can be opened with TopSolid 7.14 or 7.15 only.